Question: Which of the following women was the first woman promoted to Master Chief Petty Officer in the US Navy: Anna Der-Vartanian or Eve Beglarian?
Context: Chief Petty Officer (CPO) is the seventh enlisted rate (E-7) in the United States Navy and U.S. Coast Guard, just above petty officer first class and below senior chief petty officer.  The rate of chief petty officer is that of a senior non-commissioned officer, and was established on 1 April 1893 for the United States Navy.  The United States Congress first authorized the Coast Guard to use the promotion to chief petty officer on 18 May 1920.  Chief petty officer is also the final cadet rate in the U.S. Naval Sea Cadet Corps. The master-at-arms (MA) rating is responsible for law enforcement and force protection in the United States Navy—equivalent to the United States Army Military Police, the United States Marine Corps Military Police, the United States Air Force Security Forces, and the United States Coast Guard's Maritime Law Enforcement Specialist.  It is one of the oldest ratings in the United States Navy, having been recognized since the inception of the U.S. Navy.  It has had two rating badges during its history.  Its original MAA rating mark was an inverted star until disestablished (1797–1921).  On 20 May 1958 the inverted star reemerged as a nod to the Historical MAA Rating whose duty was to provide good order and discipline aboard ships over the enlisted crews.  Public Law 85-422, the Military Pay Act of 1958, established two new enlisted pay grades of E-8 and E-9 in all five branches of the U.S. Armed Forces.  In the U.S. Navy and U.S. Coast Guard, the new E-8 pay grade was titled Senior Chief Petty Officer and the new E-9 pay grade as Master Chief Petty Officer; as a result it was designated a single (E-8) or double (E-9) inverted star above the anchor for all collar devices and rating badges this point forward.  The MCPON Rating (1971) specialty mark was established using the former MAA inverted star and later expanded to the Command Rates of Fleet / Command Master Chief (1995) or Senior Chief (2015) Ratings.  The current MAA rating mark following its reestablishment has been a police badge with internal star (1973–present), emblematic of its police or sheriff duties as a modern law enforcement specialist. USS "Delbert D. Black" (DDG-119) will be an "Arleigh Burke"-class destroyer of the United States Navy.  She is named in honor of Master Chief Petty Officer Delbert Black, the first Master Chief Petty Officer of the Navy (MCPON), who died in 2000.  He is remembered for establishing the role of the Navy's senior enlisted leader, and the ship naming is the culmination of a decade of advocacy by MCPONs to honor him with a combatant ship, believed to be the first time in many decades that a ship has been named for an enlisted person's superior performance and impact, rather than valor or personal sacrifice.  "Delbert D. Black" will be the fourth of eight planned Flight IIA "technology insertion" ships, which will contain elements of the Flight III ships projected to begin with DDG-124. Eve Beglarian (born Ann Arbor, Michigan, U.S., July 22, 1958) is a contemporary American composer, performer and audio producer of Armenian descent.  Her music is often characterized as postminimalist. The Master Chief Petty Officer of the Navy badge is an identification badge of the United States Navy which is presented to the Master Chief Petty Officer of the Navy upon assuming office.  The Master Chief Petty Officer of the Navy badge is the highest in a series of chief petty officer identification badges. Originally, the full-size badge was worn on the lower left pocket below all awards and warfare pins.  Effective 1 October 2004, the badge was moved to the wearer's right, above the shirt pocket, and the miniature version of the badge replaced the full-size badge, to be more in line with where commanding officers wear their command-at-sea pin.  NAVADMIN 274/06 effective 25 September 2006 returned the full-size badge to its original position. Steven W. Cantrell is a United States Coast Guard member currently serving as the 12th and current Master Chief Petty Officer of the Coast Guard.  He assumed the duties of MCPOCG on May 22, 2014, relieving Michael P. Leavitt.  Prior to being named to the MCPOCG post, he was Command Master Chief of the Coast Guard's Atlantic Area, based in Portsmouth, Virginia.  Cantrell is also the Coast Guard's 12th Silver Ancient Mariner, an honor bestowed upon the enlisted member holding the enlisted cutterman qualification the longest; in this title, he succeeded Master Chief Petty Officer Lloyd Pierce, command master chief of the Coast Guard Academy. Anna Der-Vartanian (December 6, 1920 – August 4, 2011) was the first woman promoted to Master Chief Petty Officer (E-9), the highest enlisted rate in the United States Navy. Master chief petty officer (MCPO) is the ninth, and highest, enlisted rate (pay grade E-9) in the United States Navy and United States Coast Guard, just above senior chief petty officer (SCPO).  Master chief petty officers are addressed as "Master Chief (last name)" in the colloquial and they constitute the top 1.25% of the enlisted members of the maritime forces. The Master Chief Petty Officer of the Navy (MCPON, ) is a unique non-commissioned rank and position of office of the United States Navy, which has with it the paygrade of E-9.  The holder of this position is the most senior enlisted member of the U.S. Navy, equivalent to the Sergeant Major of the Army, Chief Master Sergeant of the Air Force, Sergeant Major of the Marine Corps, Master Chief Petty Officer of the Coast Guard, and Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff.  They are appointed by the Chief of Naval Operations to serve as a spokesperson to address the issues of enlisted personnel to the highest positions in the Navy.  As such, they are the senior enlisted advisor to the Chief of Naval Operations as well as the Chief of Naval Personnel.  Their exact duties vary, depending on the CNO, though they generally devotes much of their time to traveling throughout the Navy observing training and talking to sailors and their families.  Their personnel code is N00A as the senior enlisted advisor to Chief of Naval Operations and PERS-00D in their special advisory capacity to Chief of Naval Personnel/Deputy Chief of Naval Operations (Manpower, Personnel and Training).  In 1988, the MCPON's spouse was made the Ombudsman-at-Large, authorizing them to travel around the fleet with their spouse, representing the interests of the spouses of enlisted members.  While the MCPON is a non-commissioned officer, this billet is unofficially protocol equivalent to a vice admiral. A United States Navy enlisted rate indicates where an enlisted Sailor stands within the chain of command, and also defines one's pay grade.  An enlisted sailor's rate is similar conceptually to a naval officer's rank.  Only Naval Officers carry the term "rank".  The word "rate" refers to an enlisted sailor's pay grade, while the word "rating" refers to one's area of occupational specialization within the enlisted Navy.  Associated with the enlisted pay grades is a numbering system from the most junior enlisted sailor ("E-1") to the most senior enlisted sailor ("E-9").  This enlisted numbering system is the same across all five branches of the U.S. Military.  All E-1 through E-3 are known as Seamen.  E-4 through E-6 are called Petty Officers.  All E-7s are called Chief Petty Officer, E-8s Senior Chief Petty Officer, and E-9s Master Chief Petty Officer.  Rates are displayed on a rating badge, which is a combination of rate and rating.  E-2s and E-3s have color-coded group rate marks based on their career field.  Personnel in pay grade E-1, since 1996, do not have an insignia to wear.
Answer: Anna Der-Vartanian