If Morales and Rolfes Supply Negotiate for the Purchase and Sale

If Morales and Rolfes Supply negotiate for the purchase and sale of a supply of fuel for a three-year period for Morales' business,

A) the contract may indicate a method for determining the price,without stating a definite price.
B) Morales and Rolfes must depend on the UCC's gap-filler provisions to determine a price since the fuel is a "good" covered by Article 2 of the UCC.
C) the contract price must remain the same for the entire three-year contractual period.
D) their contractual requirements regarding definiteness would be the same under the UCC and the common law.