Context: English America, and later British America, were the English, and later British, territories in North America (including Bermuda), Central America, the Caribbean, and Guyana from 1607 to 1783. Formally, the British colonies in North America were known as "British America and the British West Indies" until 1776, when the Thirteen British Colonies located along the Atlantic seaboard declared their independence and formed the United States of America. After that, British North America (or, simply but not inclusively, Canada) was used to describe the remainder of Britain's continental North American possessions. The term "British North America" was first used informally in 1783, but it was uncommon before the Report on the Affairs of British North America (1839), called the Durham Report., The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces. The Department is the largest employer in the world, with nearly 1.3 million active duty servicemen and women as of 2016. Adding to its employees are over 801,000 National Guardsmen and Reservists from the four services, and over 740,000 civilians bringing the total to over 2.8 million employees. It is headquartered at the Pentagon in Arlington, Virginia, just outside of Washington, D.C., The Chesapeake Bay is an estuary lying inland from the Atlantic Ocean, and surrounded by the North American mainland to the west, and the Delmarva Peninsula to the east. It is the largest such body in the contiguous United States. The northern bay is within Maryland, the southern portion within Virginia, and is a very important feature for the ecology and economy of those two states, as well as others. More than 150 major rivers and streams flow into the bay's drainage basin, which covers parts of six states (New York, Pennsylvania, Delaware, Maryland, Virginia and West Virginia) plus all of the District of Columbia., Virginia (, officially the Commonwealth of Virginia) is a state located in the Mid-Atlantic region of the United States, as well as in the historic Southeast. Virginia is nicknamed the "Old Dominion" due to its status as the first colonial possession established in mainland British America, and "Mother of Presidents" because eight U.S. presidents were born there, more than any other state. The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna. The capital of the Commonwealth is Richmond; Virginia Beach is the most populous city, and Fairfax County is the most populous political subdivision. The Commonwealth's estimated population is over 8.3 million, which is slightly less than New York City., Dominions were semi-independent polities under the British Crown, constituting the British Empire, beginning with Canadian Confederation in 1867. They included Canada, Australia, New Zealand, Newfoundland, South Africa, and the Irish Free State, and then from the late 1940s also India, Pakistan, and Ceylon (now Sri Lanka). The Balfour Declaration of 1926 recognised the Dominions as "autonomous Communities within the British Empire", and the 1931 Statute of Westminster granted them full legislative independence., System Planning Corporation ( SPC ) is a Virginia based corporation founded in 1970 that produces military electronics , such as radar , and Systems Engineering and Technical Assistance in airwarfare , cybersecurity , program management and research of advanced weapons systems , advanced space systems and advanced microsystems for the United States Department of Defense ( DoD ) . It is principal support contractor to cabinet - level departments , including the Department of Defense , Justice and State , and Homeland Security ., The City of New York, often called New York City or simply New York, is the most populous city in the United States. With an estimated 2015 population of 8,550,405 distributed over a land area of just , New York City is also the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world. A global power city, New York City exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment, its fast pace defining the term "New York minute". Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world., The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia, across the Potomac River from Washington, D.C. As a symbol of the U.S. military, "The Pentagon" is often used metonymically to refer to the U.S. Department of Defense., The Blue Ridge Mountains are a physiographic province of the larger Appalachian Mountains range. This province consists of northern and southern physiographic regions, which divide near the Roanoke River gap. The mountain range is located in the eastern United States, starting at its southernmost portion in Georgia, then ending northward in Pennsylvania. To the west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley, bordered on the west by the Ridge and Valley province of the Appalachian range., Subject: system planning corporation, Relation: headquarters_location, Options: (A) africa (B) arlington (C) arlington county (D) australia (E) canada (F) caribbean (G) central (H) chesapeake (I) delaware (J) fairfax (K) georgia (L) headquarters of the united nations (M) india (N) new york (O) new york metropolitan area (P) new zealand (Q) north america (R) pakistan (S) pennsylvania (T) roanoke (U) south africa (V) the pentagon (W) virginia (X) washington (Y) west virginia (Z) westminster ([) york
Output: arlington county