What Is an Amicus Curiae Brief

What is an amicus curiae brief?

A) a written argument submitted to a court in support of one side of a case
B) a petition to remove a judge from a court case
C) a petition submitted to Congress in support of or opposition to a judicial nominee
D) a petition submitted to an executive branch agency, requesting a review of the agency's decision
E) an internal memo circulated among interest group leaders, briefing them on the details of a court case