Is the Federal Government Obligated to Avoid Denying Persons the Equal

Is the federal government obligated to avoid denying persons the equal protection of the law? Why or why not?

A) No, because the equal protection clause only applies to the states
B) Yes, because it's the right thing to do
C) No, because the federal government does not have a history of discrimination
D) Yes, because the Fifth Amendment Due Process Clause contains this obligation