The fbi examines a persons cellphone metadata without consent or a search warrant
Taking four wives, one from each of the major religions.
Lets use the process of elimination in your question
It can't be A because Lincoln wanted to end the war and have the Southern states join the union as quickly as possible and free all the slaves
It is most likely B because he doesn't really do much to punish he wants to end the war
C and D could easily be eliminated
Answer: B: Vietnam war
Iraq war didn't require a draft