Bruce and Rosie Entered into an Agreement

Bruce and Rosie entered into an agreement. He promised to transfer a necklace to her mother and she promised to deliver a computer to his father. Which of the following statements is most likely to be TRUE?

A) As long as Bruce's father relies upon the terms of the existing contract, and as long as he does not act inequitably, he can compel Rosie to transfer the computer to him on the basis of the doctrine of promissory estoppel.
B) There is no contract between Bruce and Rosie because there was no mutuality of consideration.
C) Even if neither Bruce nor Rosiee have yet performed, a valid contract exists on the basis of their promises to perform.
D) There is no contract between Rosie and Bruce because neither her mother nor his father are parties to the agreement.
E) As long as Bruce transfers the necklace to Rosie's mother, Bruce's father can demand delivery of the computer from Rosie.