The term "credibility gap" is most associated with which of these 20th century events? a) world war ii b) the vietnam war c) the kennedy assassination d) the civil rights movement

The "credibility gap" was a term used frequently in journalism, and with public and political discourse during the 60s and 70s. It was used mostly to describe the people's skepticism about Lyndon B. Johnson's administration's statements and policies about the Vietnam War. So I believe your answer is B.