Emily and Sasha Are Having Pizza and Talking About Cars

Emily and Sasha are having pizza and talking about cars. Emily asks Sasha if Sasha would consider selling her car for $2,000. Is this a valid offer?

A) No, there is no valid offer.
B) Yes, an offer has been made by Emily, but it may be revoked prior to acceptance.
C) Yes, an offer has been made because Emily and Sasha negotiated.
D) Yes, there is a valid offer and now a contract has been entered into.
E) Yes, there is a valid offer because the parties know each other.