In the Early 20th Century,streetcars in Many Southern Cities Required

In the early 20th century,streetcars in many southern cities required that white passengers sit in the front of car,while black passengers sat in the back.The firms that ran the streetcars were

A) in favor of the segregation laws because they lowered costs and increased profits.
B) against the segregation laws because they increased costs and lowered profits.
C) lobbied local governments to enact such laws because their customers were willing to pay more for service in order to maintain the segregation.
D) concerned about the effects of smoking.Since blacks smoked more than whites,they were supportive of the segregation laws.