Why Did a Majority of the Justices of the Supreme

Why did a majority of the justices of the Supreme Court strike down the federal Defense of Marriage Act in 2013?

A) The law was judged to violate the equal protection clause of the Fourteenth Amendment.
B) The law was judged to usurp an area of traditional state authority.
C) The law was judged to be discriminatory in nature.
D) The law was judged to violate the due process clause of the Fifth Amendment.