In the Context of Federal Judicial Nominations, What Is Senatorial

In the context of federal judicial nominations, what is senatorial courtesy?

A) The Supreme Court will not appoint anyone without checking with senators first.
B) During judicial confirmation hearings, senators are not allowed to verbally attack each other.
C) During judicial confirmation hearings, senators are not allowed to verbally attack the nominee.
D) During judicial confirmation hearings, nominees are not allowed to verbally attack senators.
E) The President will not nominate a federal judge without first clearing it with a senator from that judge's state.