Land Owner owned 250 acres of land. Vacationer asked if she could lease five acres of the land and put a mobile home on it, with an option to buy 25 acres after one year. Land Owner agreed, and a written lease was drawn up which stated that Vacationer could buy 25 acres of land after one year for $10,000, if Vacationer so decided. The exact parcel of 25 acres to be conveyed was never specified. After one year, Vacationer gave a $10,000 check to Land Owner for 25 acres. However, Land Owner gave the check back to Vacationer and refused to sell the 25 acres of land to Vacationer. If Vacationer brings an action for specific performance against Land Owner, which of the following choices is Land Owner's best defense? a) That there is an adequate remedy at law. b) That if Vacationer had breached the contract, then Land Owner could not obtain specific performance from Vacationer. c) That specific performance is not feasible because the description of the 25 acres of land to be conveyed is too indefinite. d) That Vacationer had not performed all required acts under the contract