The Great Compromise allowed for? A. three fifths of each slave to be counted for population purposes
B. two legislatures, one with an equal number of votes for every state, and one determined by proportional representation.
C. California to join the Union as a free state and a fugitive slave law to go into effect.
D. states above Missouri to be free of slavery, and states below to be open to it.

B. two legislatures, one with an equal number of votes for every state, and one determined by proportional representation

Explanation:

The Great Compromise, also known as the Connecticut Compromise was a decision reached between small and large states during the Constitutional Convention of 1787, where it as agreed that a bicameral legislature would be adopted. This meant that the upper house would have an equal number of votes per state and the lower house would proportionately represented based on the individual state population.

Therefore, the Great Compromise allowed for two legislatures, one with an equal number of votes for every state, and one determined by proportional representation.