When a high court declares and action of the executive ultra-vires, it means that

A.

the executive has to reconsider the action

B.

such an action should never be brought up again

C.

only the legislature can deal with such an action

D.

the action is illegal and of no effect

E.

a vote of no confidence has been passed on the executive by the judiciary

Correct answer is D

No explanation has been provided for this answer.