If we are speaking in reference to the colonists that later became Americans, we can cross out A and B because those are reasons they revolted. That leaves C and D, which we can use our knowledge and cross out choice D because at the time, colonists enjoyed the use of slaves because they didn't have to do as much work. Though these choices are tough, I can almost assure you that if this is a FLVS or other kind of virtual school,they will likely state it in the lesson. Hope this helps!