The correct answers are
A) Coining money - Coining money ensures that all American states are using the same currency and that the government controls the money supply.
C) Overriding a presidential veto- This allows Congress to pass a law without the approval of the president. For this to happen, Congress needs a 2/3 vote on both the Senate and House of Representatives.
D) Making laws- The primary purpose of Congress is to develop federal laws. This is done through a long process in which subcomittes examine issues in America, develop bills, get co-signers, have a vote on the bill, etc.