President Bush's Decision, with the Acquiescence of Congress, to Treat

President Bush's decision, with the acquiescence of Congress, to treat captives taken in Afghanistan as unlawful enemy combatants but to deny them the protections guaranteed by the Geneva Convention is an example of

A) an express power.
B) a delegated power.
C) a discretionary power.
D) an emergency power.
E) an executive privilege.