Which are reasons why slavery was not as important in north as in the south

Which of these questions is most likely to have been asked by a person with a federalist vievw a. "how can the govemment control violent uprisings without a national army? " b. "what if the govemment asks for taxes that some people can't pay? " c. "how can the govemment meet the needs of both small states and big states? " d. "what if wealthy property owners are allowed to get their way all the time?