Answer:
Of the options presented a major function of the President's cabinet members is D. To oversee the operation of executive departments.
Explanation:
The Cabinet is meant to advise the president on the issues that are relevant to each of their offices. Like the Secretary of the Treasury, and the Secretary for the Department of the Interior. The president nominates the heads of the executive departments and all other federal agency heads. The nominations are then presented to the Senate that can confirm each appointment by a simple majority. George Washington's cabinet had only 4 secretaries and now there are 23 Cabinet positions including 7 who are cabinet-level officials like the director of the CIA.