Probably B I'm not sure though
Answer Cuban Missile Crisis: Three Men Go to War focuses on three central figures in the crisis — President John F. Kennedy, Soviet Premier Nikita Khrushchev and Cuban leader Fidel Castro.
Explanation:
Answer: When they sign a yellow- dog contract they are agreeing to the company which forces each individual worker to sign, on the penalty of not getting the job (or if he already has the job, of losing it), binding the worker to surrender his right to organize. In other words, yellow dog binds the worker not to join a union.