Kevin Offers to Sell Howard His Vintage Piano for $1,000

Kevin offers to sell Howard his vintage piano for $1,000.Howard tells Kevin,"If you don't hear from me in seven days,I accept." Kevin did not hear from Howard in those seven days.Does Howard's silence amount to acceptance?

A) No,because an offeree's silence can never operate as an acceptance.
B) Yes,because an offeree's silence can operate as an acceptance if he has indicated that it will.
C) No,because Howard did not have the present intent to accept the offer.
D) No,because Kevin and Howard did not have a prior course of dealings.