I think they are all true but I did this unit a little while ago so I might be wrong
The fourth plague of Egypt was of creatures capable of harming people and livestock. The Torah emphasizes that the 'arob (עָרוֹב, meaning "mixture" or "swarm") only came against the Egyptians, and that it did not affect the Land of Goshen (where the Israelites lived).
Hope This Helps! Have A Nice Day!!
Answer is A.
Because Missouri was admitted as a slave state & Maine was admitted as a free state due to the Missouri compromise.