Optional Clause Jurisdiction Differs from Contentious Jurisdiction in That, Optional

Optional clause jurisdiction differs from contentious jurisdiction in that, optional clause jurisdiction is ________.

A) the requirement that a tribunal must have power over the parties before it may hear a dispute
B) the power of the ICJ to give opinions about issues of international law at the request of the United Nations or one of its specialized agencies
C) the power of a court to hear a matter that involves a dispute between two or more parties
D) a unilateral grant of jurisdiction by a state to the ICJ that allows the Court to resolve disputes involving that state