The correct answer is:
D. It gave slave-holding states more influence than was warranted by the size of their voting population.
The Three-fifths Compromise, enacted during the Constitutional Convention of 1787, allowed slave states to count three-fifths of their enslaved population for purposes of taxation and representation. This arrangement increased the political power of slave-holding states in the House of Representatives and the Electoral College, giving them more influence relative to their free population size. This compromise contributed to tensions between slave and free states leading up to the Civil War.