Jackie tells a group of friends that she plans to sell her home. Meg asks how much Jackie hopes to get for the house and Jackie replies, "$50,000." Meg says, "I accept your offer. I'll purchase your house for $50.000." No contract exists because

a. The offer isn't properly communicated

b. The terms of the offer aren't reasonably certain

c. Jackie doesn't seriously intend to enter a contract

d. Jackie's statements are merely preliminary negotiations