The Three-Fifths Compromise taxed slave owners for three-fifths of their slave population and counted three-fifths of their slaves for Congressional representation.

This is correct.

Explanation:

The three-fifth compromise was a compromise reached by United states delegates during the 1787 United States Constitutional Convention. It was based on the questions asked: "if slaves should be counted for taxation and legislative representation, and if they are counted, how should they be counted?"

The delegate was proposed by James Wilson, and in the end it was agreed that only three out of every five slave population would be counted for this purposes.

answer:    

a.

explanation: