Which of the following is the best definition of a constituent?
a. It is another name for a voter.
b. It is the name for a member of Congress running for re-election.
c. It is someone who donates money to a campaign.
d. It is a person who lives in the district represented by a member of the legislature.
e. It is the name for a person who has sued the federal government in court for violating the Constitution.