Why do you think most people who were alive on the day kennedy was assassinated remember exactly
where they were at the time?

*he was a very popular president.
*the event was widely covered in the media,
*it was a traumatic event for the whole country.

The event was widely covered in the media.

Explanation:

John F. Kennedy was the 35 number president of the united states, he was assassinated in Dallas, Texas on 22 November 1963 by a sniper while riding in an open motorcade, former unites states marine Lee Harvey Oswald was convicted for the assassination of President Kennedy.

This event was widely covered by the united states and international media, Mr. Abraham Zapruder filmed this entire event in his camera with 8-second video in Kennedy seen with fatal injuries.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers

i would say b. or c.