The answer I found on the internet is Letter D - Motels.
The growth of the AUTOMOBILE INDUSTRY caused an economic revolution across the United States. <span>Travelers on the road needed shelter on long trips, so </span>MOTELS<span> began to line the major long-distance routes.</span>
Economic exploitation, social terror and political disenfranchisement were the push factors. The political push factors being Jim Crow, and in particular, disenfranchisement. Black people lost the ability to vote.
