Germany prompted the United States to join World War I because of it's violation of the pledge for unrestricted submarine warfare in the North Atlantic Ocean and Mediterranean Sea, as well as enticing Mexico to turn against the United States. I hope this helps :)
In the end of the major case of Brown Vs. Board of Education,
the Supreme Court ruled that racial segregation in public education facilities was UNCONSTITUTIONAL. This being said, the answer to your question, is D.
It struck down segregation laws as unconstitutional.
In 1969, Nixon halted the dumping of toxics into the Great Lakes. Nixon was responsible for the push to develop the Environmental Protection Agency. He created the Council on Environmental Equality in 1970 and passed the Clean Air Act in 1972.
The Lend Lease Act was an attempt by the United States to support other nations within the Allied Forces during World War II. Under this program the United States provided other Allied nations with food, oil, and material from 1941 to 1945.