Answer choices are:
A) The President was assassinated.
B) Johnson decided not to run for reelection.
C) Nixon was under Congressional investigation.
D) The United States was beginning to be involved in Vietnam.
Correct answer choice is:
B) Johnson decided not to run for reelection.
Johnson shocked everyone with 2 surprise announcements:
He would stop the bombing in most of North Vietnam in order to negotiate with them and stop the war.
He wouldn't endure election. LBJ, who had thus hungered for the presidency, got enough benefit after his decision.