Answer:
C. It primarily took place in the 1950s and 1960s.
Step-by-step explanation:
The Civil Rights movement was a decade-long struggle or campaign which was primarily started in the 1950s and 1960s by the African Americans for an end to institutionalized racism, Jim Crow laws, social justice, socioeconomic inequalities, segregation, disenfranchisement and the likes in the United States of America. It was mainly championed by Martin Luther King Jr and Malcolm X, as well as some other black American allies.
Hence, one of the characteristics of the Civil Rights movement is that it primarily took place in the 1950s and 1960s, precisely it started in 1954 and ended in 1968.
Similarly, the Civil Rights Act of 1964 is a civil rights and labor law in the United States of America that prohibits discrimination in employment, segregation in schools, and enforces the constitutional voting rights of the citizens.
The Civil Rights Act of 1964 was enacted by the 88th US Congress and signed into law on the 2nd of July, 1964 by President Lyndon B. Johnson.