In What Sense Is the Veto a "Qualified Negative" Power

In what sense is the veto a "qualified negative" power?

A) The veto has a negative effect on the ability of Congress to conduct its business as qualified by the Constitution.
B) Congress can negate the president's legislative agenda by refusing to qualify his or her proposals as ripe for consideration, something that is akin to a legislative veto.
C) The president can veto negative or harmful legislation before it qualifies for review by the Supreme Court.
D) The president can negate legislation passed by Congress, but this power is qualified by Congress's ability to override the president's veto.