Under the UCC, When May Orders for Specific Performance of a Contract

Under the UCC, when may orders for specific performance of a contract for the sale of goods be awarded?

A) Only when the goods are unique.
B) Only when the goods are in excess of 500 in quantity.
C) Only when the goods have been ordered at least six months in advance.
D) When the goods are unique and when the goods are in excess of 500 in quantity.
E) When the goods are unique or in other proper circumstances.