Answer: The apportionment of the House of representatives
Explanation: This compromise was reached during the Constitutional Convention of 1787 and determined how slaves would be counted for purposes of representation and taxation. It established that each enslaved person would be counted as three-fifths of a person when apportioning representation in the House of Representatives. This was a contentious issue between northern and southern states and was a way to balance the interests of both regions in the new government.