Plz what is the middle passage? a. the second leg of a triangular trip form africa known for its inhumane conditions b. an understanding that southern plantation owners could purchase slaves on a trial basis and then return those who proved inadequate. c. slaves in their late teens and twenties who were the strongest of all slaves d. the period when the slave trade was at its height, operating in very worst conditions. i think is either a or d but i don't know and need .