In june of 1971, which event increased the credibility gap and anti war protests?

the massacre of civilians at my lai

the killing of four students at kent state university

the leaking of the pentagon papers to the press

the bombing of viet cong bases in cambodia

answer:

won re-nomination with no opposition he also had the support of his party

explanation:

it saw incumbent president andrew jackson, candidate of the democratic party, defeat henry clay, candidate of the national republican party. jackson won re-nomination with no opposition, and the 1832 democratic national convention replaced vice president john c. calhoun with martin van buren.

i believe the correct answer is b.