A real estate broker contracted to sell a piece of land to Marilyn Curry. At her request, the contract states, This contract is contingent upon the buyer obtaining a rezoning for a mobile home park and campground. This contract is to be void if the rezoning is not obtained within 120 days. After 65 days, Curry notifies the broker that she would buy the property, irrespective of a zoning change. The zoning change was not obtained during the 120-day period. The broker now refuses to convey, and Curry sues. Who wins? Why?