Valerie contracts with Esteban, who agrees to build a stone retaining wall and drain on her property. The wall and drain are necessary to prevent erosion of her land, which is falling into the creek on her property at a rapid rate. If Esteban breaches the contract, Valerie is under a legal obligation to:__________.
a. wait until Esteban is prepared to build the wall and drain.
b. mitigate her damages.
c. do nothing, because she is the innocent party and thus has no legal duties.
d. absorb all of the costs associated with the property erosion caused by Esteban's breach.