Lester and Myrtle Want to Rescind Their Contract Under Which

Multiple Choice

Lester and Myrtle want to rescind their contract under which Lester sold an MP3 player for $40.To rescind the contract

A) Lester must return the $40 and Myrtle must return the player.
B) Lester must return the $40 only.
C) Myrtle must return the player only.
D) the parties can keep the "benefits" of their bargain.