Under the UCC, open terms, or missing provisions in a contract, are

Multiple Choice

absolutely forbidden and void the contract.

only allowed if the open term is quantity.

entirely acceptable so long as there is evidence the parties intended to enter into a contract and other terms are sufficiently articulated to provide for remedy in the case of a breach.

never acceptable because the UCC requires that all commercial transactions for the sales of goods be outlined with specificity and thoroughness.