Silas,very Angry Because His New Car Broke Down,yells Out "Anyone

Silas,very angry because his new car broke down,yells out "Anyone wanna buy a piece of junk for $100?" Ida overhears Silas and says,"I do,here's $100." What result?

A) Silas must sell his car for $100,since his statement was clear and definite.
B) Silas need not sell his car for $100,since he was clearly angry.
C) Silas must sell his car for $100,but only if he were speaking directly to Ida.
D) Silas must sell his car for $100,because his anger does convey serious intent.