The answer is B. and C.
I hope i helped out! Feel free to mark brainliest!
Based on my prior knowledge, 90% positive the answer SHOULD be,"C)<span>Trusts should be allowed to exist, but with tight government regulatory control".</span>
Most likely A. Note how all the others are good, but that one is classified bad. Also think, if you were her would you do this? you'd most likely want to get payed for your discovery, and charge people to come watch. Thinking logically i'd go with A.
Answer:
A. Participation of the United States in the Vietnam War