Question: What radio station is located in MA & is a primary entry point for the emergency alert system?

Context paragraphs:
Emergency Broadcast System: The Emergency Broadcast System (EBS), sometimes called the Emergency Action Notification System (EANS), is a former emergency warning system used in the United States.  It replaced the previous CONELRAD system and was used from 1963 to 1997, at which point it was replaced by the Emergency Alert System.

Specific Area Message Encoding: Specific Area Message Encoding (SAME) is the protocol used to encode the Emergency Alert System (EAS) and NOAA Weather Radio (NWR) in the U.S. and Weatheradio Canada in Canada.  It is also used to set off receivers in Mexico City and surrounding areas as part of the Mexican Seismic Alert System (SASMEX).

KOGO (AM): KOGO ("Newsradio 600 KOGO") is a talk radio station in San Diego, California.  One of seven radio stations in San Diego owned and operated by iHeartMedia, KOGO's main focus is local news and syndicated talk shows. With 5,000 watts day and night, the AM signal is one of the strongest in the region.  The station's studios are located in San Diego's Kearny Mesa neighborhood on the northeast side.  The signal pattern generally follows the coast from the transmitter site in San Diego, with reception good to Santa Barbara and beyond.  Because of the power of the station, KOGO is one of the primary Emergency Alert System stations for the San Diego radio market.  The station is the first, and the only AM radio station, in the San Diego market to broadcast in HD Radio.  The KSON 97.3 antenna is at the top of one tower and the KLNV 106.5 antenna is at the top of the other.

WJCL-FM: WJCL-FM (96.5 FM), known as "Kix 96", is a radio station in Savannah, Georgia featuring country music.  WJCL-FM is a 100,000 watt FM station which serves as the secondary Emergency Alert System radio station for the region.  Its studios are located on Television Circle in Savannah and utilizes a transmitter located west of the city in unincorporated Chatham County.

Jefferson Kaye: Martin Jeff Krimski, known by the stage names Jefferson Kaye and Jeff Kaye (December 12, 1936 – November 16, 2012) was an American radio, television and film announcer.  Among his credits were announcing gigs at WHIM and WRIB in Providence, Rhode Island; WBZ in Boston, Massachusetts; WKBW and WBEN in Buffalo, New York; WPVI in Philadelphia; and NFL Films.

Digital Emergency Alert System: The Digital Emergency Alert System (DEAS) was a system managed by the Federal Emergency Management Agency (FEMA) and designed to alert first-responders and civilians in the event of a national emergency.  It was based upon and supplemented the Emergency Alert System (EAS) by sending out text, voice, video, and other digital messages to mobile phones, pagers, radios, and televisions.

WBZ (AM): WBZ (1030 kHz AM) is a Class A clear channel radio station, owned and operated by CBS Radio and licensed to Boston, Massachusetts.  WBZ additionally transmits using the HD Radio digital format, and its programming is also carried on WBZ-FM's HD3 digital subchannel.  The station's studios are in Allston, Boston, and its transmitter site is at Hull, Massachusetts.  WBZ is a designated Primary Entry Point (PEP) for the Emergency Alert System (EAS).

WFLF (AM): WFLF (540 kHz "NewsRadio 102.5 WFLA") is a commercial AM radio station licensed to Pine Hills, Florida and serving Greater Orlando.  It is owned by iHeartMedia and airs a Talk Radio format.  The programming is simulcast on co-owned FM translator station W273CA, heard on 102.5 MHz in Orlando.  The studios and offices are in the iHeart Orlando complex in Maitland.  The transmitter is off Tower Pine Drive in Winter Garden.  The station broadcasts using a directional antenna at all times, with the signal extending to the east to avoid interfering with Class A stations in Canada and Mexico.  The power is 50,000 watts by day (the maximum permitted by the Federal Communications Commission) and 46,000 watts at night.  WFLF is a Primary Entry Point station in the Emergency Alert System.

WMTX: WMTX is a Hot AC radio station in Tampa, Florida known as "Mix 100.7".  It plays a variety of current hits along with some hit music from the past, as far back as the 1980s.  Owned by iHeartMedia, Inc., the station's studios are located in South Tampa and the transmitter site is in Riverview.  WMTX also serves as the primary Emergency Alert System station for all of Tampa Bay.

WIBW-FM: WIBW-FM (94.5 FM) is a country music radio station in Topeka, Kansas.  Until 2000, the station was located at 97.3 FM.  The station was moved to make way for a new move-in station in Kansas City.  The station also serves as the primary Emergency Alert System station for the state of Kansas along with KTPK.

Supporting paragraphs: Jefferson Kaye WBZ (AM)
Answer: WBZ