The Constitutional Foundations of the Veto ______

The constitutional foundations of the veto ______.

A) allow the President the absolute authority to block congressional actions and completely dominate the national agenda
B) represent a carefully tailored authority to check legislative abuses while denying the executive unilateral authority
C) are not carefully delineated in the Constitution so its use is ambiguous
D) allow the President to aggressively use the veto to block legislative action