I think the answer is d. The slave owners could keep the slaves working in the field by turning them in because they were jobless. It was illegal back them to be jobless. The thirteenth amendment said you could not be a slave unless you were a prisoner.
If you need more help look up thirteenth amendment
It limited the power of the king
A and B, I believe. Maybe D. But C is wrong. I hope this helps.
-RaccAttacc
I was in a Canadian History Class at the time. Our prof was concerned but he was calm while everyone else was in a great flurry. He did,however, say that Kennedy had ICBMs Khrushchev did not. He turned out to be very accurate in his assessment. Russia could not launch missiles without retaliation, so Khrushchev blinked. He was a pretty tough guy who had survived Leningrad so it was a pretty big blink.
You might want to make research on that in the urban graph network. It shows you everything.