European slave traders did not have to capture slaves in West Africa themselves because A, B, C, or D

The formation of business monopolies in the late 1800s was made possible by the (1) effects of laissez-faire policies (2) passage of federal antitrust laws (3) elimination of the free-enterprise system (4) adoption of socialist economic practices

How did the phillips brothers expand their businesses? by selling it to other businessmen by changing their source product by merging their companies by acquiring government support

What would be considered a secondary source about the assasination of abraham lincoln