Which best explains why many african americans had not registered to vote by the 1960s?

The correct answer is intimidated by violent threats and actions.

During the 1960's, African-Americans still faced a significant amount of discrimination in American society. This included threats and physical violence. Groups like the Ku Klux Klan, a white supremacist organization, used fear tactics in order to stop African-Americans from voting during this era. This included death threats or actually violence if they showed up to the polling place.

Ithink its c) the conditions in the factory have never been questioned by the employee.