How Did America's Constitutional Convention of 1787 Deal with the Discord

How did America's Constitutional Convention of 1787 deal with the discord between pro- and anti-slavery delegates?

A) It took no action because many delegates believed slavery would end in the near future as it became less and less profitable.
B) It compromised by stipulating that an enslaved person would count as three-fifths of a person for purposes of taxation and proportional representation in the House of Representatives.
C) It decided that slavery would not be permitted in new states formed after the Constitution's ratification.
D) It decided that a new state would make the decision whether to permit slavery itself before seeking admission to the Union.