What did the 3/5 compromise do? select one: a. the votes of 3/5 of the southern states would be needed to pass any federal legislation affecting slavery. b. for purposes of representation a slave would be counted as 3/5 of a free person c. for purposes of taxation, the numbers of slaves in a state would not be counted once they had exceeded 3/5 of the free population. d. the votes of 3/5 of the southern states would be needed to pass any federal legislation affecting representation or taxation.