Answer:
The answer is: A) can be declared unconstitutional if they usurp the power of another branch of government.
Explanation:
Executive orders are something like laws delivered by the president. The US Constitution allows the executive branch certain powers to rule or regulate, these powers are called Ordinance Powers. Sometimes the president may act jointly with the senate to pass some executive orders regarding top ranking officers of his government including:
Executive orders can only be dismissed if congress passes a law that eliminates them or the judiciary branch declares them unconstitutional.