Silence can be acceptance when: The offeree takes the benefits of offered goods or services and should have known payment is expected. only if agreed to only for UCC sales contracts the parties have

a. Should the offeree take the benefits of offered goods or services and have known payment is expected?
b. When can silence be considered acceptance?
c. What is the condition for silence to be acceptance?
d. Under what circumstances can silence be considered as acceptance?