The right to due process means that the government:

O

A. can't limit citizens' free speech.

O

B. holds elections at the same time every year.

O

C. is part of a federalist system.

O

D. has to follow the law in its treatment of citizens.

D seems reasonable to me because the Due Process Clause of the Fourteenth Amendment is exactly like a similar provision in the Fifth Amendment, which only restricts the federal government. It states that no person shall be "deprived of life, liberty, or property without due process of law." Usually, "due process" refers to fair procedures.