Rangle contracts with Siena to buy a certain horse for her. Rangle makes a deal with Timberline Stables, the owner of the horse, and makes a down payment. Siena fails to pay the rest of the price. Timberline sues Rangle for breach of contract. His right to hold Siena liable for any damages that he has to pay is the right of:
a-avoidance.
b-cooperation.
c-indemnification.
d-reimbursement.