The Appointments Clause [of Article II] clearly implies a power of the Senate to give advice on and, if it chooses to do so, to consent to a nomination, but it says nothing about how the Senate should go about exercising that power. The text of the Constitution thus leaves the Senate free to exercise that power however it sees fit. Throughout American history, the Senate has frequently – surely, thousands of times – exercised its power over nominations by declining to act on them.
D. To research its historical background and original purpose
This gives you the information and reason behind the work and explains where it comes from
The answer is B this looks hard
Answer: B totalitarianism
All of the rest, excluding this one, would be a form of government that is widely used and also authorized.