Alice owns a small business that sells handmade goods and Bob is a supplier who provides Alice with the materials she needs to make her products. Alice and Bob have been working together for several years, but they have never signed a formal contract. Recently, Alice has been unhappy with the quality of the materials Bob has been providing, and she wants to terminate their relationship.

Alice and Bob have an express agreement because $\_\_\_\_\_.$

the terms are known to the parties

the terms arose by implication

the terms arose because of industry standards

None of the above