Answer:
A. The president vetoes a bill by ignoring it until Congress dismisses.
Step-by-step explanation:
The US President has the power of vetoing the laws that are passed by the Legislative Branch as a part of the check and balances system. The Pocket Veto is not a part of this system. When a law is passed, the President has 10 days to review the measure and sign it or not. The Pocket Veto occurs when the President does not veto the law, but simply ignores it. Almost every president has used it since James Madison in 1812.