How Do Veto Threats Shape Congress's Creation of Legislation

How do veto threats shape Congress's creation of legislation?

A) The president continually gives speeches on the floor of the House, and Congress adjusts based on these multiple speeches.
B) The Supreme Court takes these veto threats as statements of law and will strike down contrary laws passed by Congress.
C) The press generates these veto threats, and the president, sensing their unpopularity, takes these threats to Congress.
D) Legislation is rarely changed by presidential veto threats.
E) Content of legislation is often changed to more closely match the president's preferences.