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) The authors of bills in Congress take these threats seriously, and change the content of legislation to be more favorable to the president.
E) The veto threats issued by the president do not change the creation of legislation.