The Great Compromise, created by Roger Sherman,

a. made all representation proportionate to the size of individual states.

b. called for a policy of "one state, one vote."

c. actually aggravated the situation of free and slave states.

d. successfully split the differences between small and large states.

Option A, made all representation proportionate to the size of individual states, is the right answer.

Explanation:

The Sherman Compromise is also called the Great Compromise or the Connecticut compromise. It was an agreement made between the small and the large states to define the power of each state would have in the Constitution of the United States and the legislature. This compromise presented a dual system of congressional representation. According to this compromise, each state, in the House of Representative, would be allocated seats in proportion to the population of its state. Moreover, the same number of seats would be assigned to all the states in the Senate.