How were white Europeans able to acquire most of the slaves that they wanted from Africa?

The history of the European seaborne slave trade with Africa goes back 50 years prior ... to find the source of prized African gold, and to locate a possible sea route to ... It was near a region that had been mined for gold for many years and was ... They tried to recruit native Americans, but many died from diseases

The answer is (c) A government that does not protect liberty is unacceptable. I took the test.