Which statements about American involvement in Vietnam are true?

Choose all answers that are correct.

A.
American presidents of both parties supported the war so as not to appear soft on communism.

B.
Presidential advisors urged both Kennedy and Johnson not to send American forces to Vietnam.

C.
Many Americans questioned their government's motives and justification for sending troops to Vietnam.

D.
When the U.S. started bombing Hanoi, communist forces in South Vietnam surrendered.
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