Congress has an implied power to do something not explicitly described in the constitution that is necessary to fulfill its other constitutional requirements. this power is based in the necessary and proper clause.
Explanation:
The Necessary and Proper Clause is introduced in the Constitution of the United States in its Article I, Section 8. This clause establishes that Congress may sanction the laws necessary to be able to exercise its powers efficiently. That is, this clause removes rigidity from the Constitution, by establishing that those laws and procedures that are reasonable, proper and necessary cannot be classified as unconstitutional. For this reason, this clause is also called "Elastic Clause".
citizens have a responsibility to participate in their government by registering to vote and voting in elections. By voting, citizens have a voice in their government and help ensure that the democratic representative system of government is maintained.
It doubled, we can definitely rule out D and B seems highly unlikely. I am taking a test with this question on it right now so if this is wrong i will let you know the right answer in like 10 mins.