If the purchaser of a timeshare wishes to waive his right to rescind the purchase, which of the following is true?

A - He may only do so if the timeshare purchase contract includes a provision for cancellation after the first use of the timeshare property.
B. He must wait at least 24 hours after signing the purchase contract before he can waive his right to rescind.
C - He may only do so if the timeshare purchase is for a contract period of less than five years.
D - He may not waive his right to rescind under any circumstances.