Geof Offers to Sell His Honda for $10,000 to Ilsa,who

Geof offers to sell his Honda for $10,000 to Ilsa,who says,"I'll pay no more than $5,000." Geof says,"Forget it.I changed my mind." Geof's offer was terminated by

A) Geof and Ilsa.
B) Geof.
C) Ilsa.
D) the market prices of similar vehicles.