Some Slave-Ship Captains Favored the "Tight Packing" Method, Deliberately Overcrowding

Some slave-ship captains favored the "tight packing" method, deliberately overcrowding their human cargo on a Middle Passage voyage on the assumption that:

A) A higher number would survive if given marginally more room aboard.
B) A higher number would survive if the transatlantic voyage was sped up by one month.
C) A few more captives might survive than on a ship that was less crowded.
D) The crew was more likely to be overpowered by a larger number of captives and the effort aborted.