It is D. Profit motive is what drives business start ups
African Americans had to pay a tax in order to vote. They also had to take a literacy test to see if they could read but they failed it anyway so they could not vote. The Grandfather Clause states that their grandfather could not be slave in order to vote. But slavery had ended a few years back which made most not being a able to vote.
They were put to work in harsh conditions in the fields.
The 4th admendment keeps police from ureasonable searches