Which fact provides the BEST evidence to support the conclusion that the US experienced a revival of conservatism in the early 1960s?

The best evidence supporting the conclusion that the US experienced a revival of conservatism in the early 1960s is the rise of influential conservative figures and organizations, such as Barry Goldwater's presidential candidacy in 1964 and the establishment of the National Review magazine in 1955. These developments signaled a growing discontent with liberal policies and a rallying of conservative activists around issues like limited government, anti-communism, and traditional values. Additionally, the increasing popularity of conservative ideology in response to social changes and the Civil Rights Movement further illustrates this revival.