Which statement about the Senate’s role in federal appointments is correct?
The Senate must approve the appointment by a vote of two-thirds of the Senate.
The Senate recruits and interviews candidates for federal appointments.
The Senate hires investigators to determine a nominee’s qualifications.
The Senate can approve or deny an appointment without explanation.

The Senate can approve or deny any appointment without explanation.

Explanation:

The statement above is related to the "Appointments Clause" of the United States Constitution. Under this clause, federal appointments may be approved or denied by the Senate without explanation. This means that the President of the United States may appoint federal positions but these have to be confirmed by the Senate. The advice and consent of the Senate is very important in filling those positions.

It is also the discretion of the Senate to accept or reject the appointees of the President. This prevents the president from exercising a monarchy-type of power.

So, this explains the answer.

answer; curiosity;