The answer is A, final answer.
Probably the best place to find info about education or training requirements for a job would be the internet. Google usually can provide proper resources, and if that doesn't help, someone you trust that is well educated can be another reliable source.
Answer:
because of two structural features in American politics: single-member districts and winner-take-all elections.
Answer:
DOMA was subject to numerous lawsuits and repeal efforts, the U.S. Supreme Court declared Section 3 of DOMA unconstitutional under the Due Process Clause, thereby requiring the federal government to recognize same-sex marriages conducted by the states.