Which Is One Reason Why the Power and Responsibility of the Presidency

Which is one reason why the power and responsibility of the presidency has increased?

A) The presidents' use of the line-item veto has increased their power over the Congress.
B) The budgets for government agencies have decreased,leaving more responsibility to the president.
C) Modern presidents have to exercise powers as commander in chief,while earlier presidents did not.-Consider This: While the role of commander in chief has changed with time,even our earliest presidents had to contest with the challenges posed by being a military leader.
D) The United States has increased its prominence on the world stage.