Article 49.....Which of the following is not an example of checks and balances:
     A.  The presidential veto
     B. The congressional power to vote against presidential appointments.
     C. Supreme Court invalidation of unconstitutional laws.
     D. The right of the president to invalidate treaties made by the House of Representatives.
     E. A & C
 
Article 50.....The 18th Amendment was added to the Constitution in order to enable
     A. Congress to implement a personal income tax.
     B. The president to appoint a vice president with the advice and consent of the Senate.
     C. Equal voting rights for all citizens regardless of race, gender, or previous condition of servitude.
     D. The enactment of Prohibition. (the answers are in articles below)