Given the following reasoning and answer, what was the question? The important part for answering this question is: Confirmation by the Senate allows the President to formally appoint the candidate to the court.
The answer: the Senate
The question Passage: The appointment and confirmation of Justices to the Supreme Court of the United States involves several steps set forth by the United States Constitution, which have been further refined and developed by decades of tradition. Candidates are nominated by the President of the United States and must face a series of hearings in which both the nominee and other witnesses make statements and answer questions before the Senate Judiciary Committee, which can vote to send the nomination to the full United States Senate. Confirmation by the Senate allows the President to formally appoint the candidate to the court.

Question: Based on this passage, who approves the appointment of a supreme court justice?