Terry's dog, Kelly, was lost. Terry was very concerned and put up posters with a picture of Kelly, and offered a $400 reward for the safe return of the dog. Based upon the assigned readings from your Business Law textbook, which of the following is correct: Select one: O a. A dog cannot be the subject matter of a contract b. The $400 reward is an invitation to treat c. The offer to pay $400 is a gratuitous promise d. The offer to pay $400 is a unilateral contract