Answer:
d. bound by the contract, under a theory of agency by estoppel
Step-by-step explanation:
Marisol is bound by the contract because during the negotiation Charlie and Jamal, he created an appearance that will make Jamal believe that Charlie was his agent, he did not counter the claim that the bicycle was up for sale. Under the theory of agency by estoppel, a contract exist and is binding on a principal when he or she creates the appearance of an agency even though it actually does not exist. The action of Marisol created the impression that Charlie is his agent even though he actually is not so the contract is binding on him to sell the bicycle to Jamal.