Choice "C" is correct.  Under the Sales Article, if parties' contracts are incomplete, the Article has many gap filling provisions through which the contract may be completed.  However, the courts will not enforce a contract that does not state the quantity of the goods bought and sold, either specifically or in terms of output of the seller or requirements of the buyer.Choice "d" is incorrect. If the price term is missing from a contract, the Sales Article provides that the price shall be a reasonable one.Choice "a" is incorrect.  Generally, a contract for the sale of goods need not be in writing to be enforceable, so no signature is required.  If the contract is for the sale of goods for $500 or more (i.e., it is within the Statute of Frauds), the contract is unenforceable unless its material terms are evidenced by a writing signed by the party "to be charged" (i.e., the party being sued).Choice "b" is incorrect. As explained above, generally a writing and signature are not required at all.  And even if the contract is within the Statute of Frauds, the signature needed is the partying being sued, not the party seeking to enforce the contract.