Where are powers such as declaring war and establishing post offices listed?

• A. The President's Powers
• B. Implied Powers
• C. Elastic Clause
• D. Enumerated / Expressed Powers

Answer: (D)

These are enumerated (expressed) powers. They’re specifically listed in the Constitution as powers granted to Congress: declaring war and establishing post offices appear in Article I, Section 8. That makes them explicit, written powers rather than ones inferred from other authorities. The Elastic Clause (Necessary and Proper Clause) deals with implied powers—it allows Congress to do what’s needed to exercise its enumerated powers, but it isn’t the source of these listed powers themselves. So the best answer is that these are enumerated/expressed powers.