With Regard to Presidential Pardons, All of the Following Statements

With regard to presidential pardons, all of the following statements are true except

A) the Supreme Court has ruled that presidents can grant pardons or reprieves for all offenses.
B) presidents may grant a pardon only if the person to be pardoned has been convicted of a crime.
C) President Ford pardoned President Richard Nixon for his role in the Watergate affair.
D) President Carter issued a blanket pardon for Vietnam War-era military draft resisters.
E) the Constitution gives the president the power to grant reprieves and pardons.