QUESTION 27 Typically, contracting parties reach mutual assent using a combination of A. an offer and an acceptance B. an invitation to negotiate and an offer C. an offer and promissory estoppel D. an invitation to negotiate and an acceptance QUESTION 28 Which of the following provides that the acceptance of an offer is generally effective upon dispatch of the acceptance when sent in a commercially reasonable manner, and not when the acceptance is received by the offeror? O A. The promissory estoppel doctrine B. The mailbox rule C. The commercial dispatch rule D. The mirror image rule