When Harry Met Sally Last Month,he Fell in Love

When Harry met Sally last month,he fell in love.Unfortunately Sally did not.He has appeared at her door twice daily since then to ask her to go on a sailing vacation.Sally has repeatedly told Harry to leave her alone,but he ignores that.Finally,Sally said,"I'll give you $100 if you never come here again." Harry left Sally alone for two months and then demanded the $100,which Sally refuses to pay.Which is true?

A) This is an illegal contract because it requires the parties to violate a statute.
B) Sally is obligated to pay because Harry has lived up to his end of the deal.
C) To be paid,Harry must prove beyond a reasonable doubt that he has left Sally alone.
D) A court would likely find that no contract exists between Harry and Sally.
E) Harry cannot collect from Sally because they said "never" and only 2 months have passed.