Which of the following is a way for a bill to become law without the president's signature?

A bill can indeed become law without the president's signature if the president does not sign the bill within ten days while Congress is in session. This is a provision established by the U.S. Constitution, which allows a bill to automatically become law after this period if the president chooses not to act on it. This scenario is primarily known as a "pocket veto" when Congress is adjourned, but the situation presented here applies when Congress remains in session.

This mechanism is significant as it prevents the president from having the final say on every piece of legislation, allowing Congress to ensure that important measures can take effect without prolonged delays. It reflects the balance of power within the U.S. government, emphasizing the role of Congress while still giving the president a degree of influence over legislation.