Fara Hires Gil, a Real Estate Broker, to Act as Her

Fara hires Gil, a real estate broker, to act as her agent to sell her land for $150,000. Before the land is sold at the stated price, oil is discovered beneath it, causing its market value to increase considerably. The agreement between Fara and Gil is likely

A) continued with a proportionate increase in Gil's sales commission.
B) continued until Gil tells prospective buyers of the discovery.
C) terminated by act of the parties.
D) terminated by operation of law.