Answer is A: How the number of Congressional representatives would be determined.
Explanation/detail:
The Great Compromise was a measure decided during the United States Constitutional Convention in 1787. The Great Compromise resolved a dispute between small population states and large population states. The large population states wanted representation in Congress to be based on a state's population size. The smaller states feared this would lead to unchecked dominance by the big states; they wanted all states to receive the same amount of representation. The Great Compromise created a bicameral (two-chamber) legislature. Representation in the House of Representatives would be based on population. In the Senate, all states would have the same amount of representation, by two Senators.