Task: Question Answering
Input (English): What is the judge ad hoc?
(A)If a party to a contentious case before the ICJ does not have a national sitting as judge, it is entitled to nominate someone as a judge solely for that case, with the title of judge ad hoc (B)Judge ad hoc is the member of the bench of the ICJ with a casting vote (C)Judge ad hoc is a surrogate judge, in case a judge is disqualified or passes away (D)Judge ad hoc is the judge that each party will always nominate in every contentious case
Output (English): A