Ron uses his status message on his facebook account to invite his friends to buy his desktop computer. his friend carl is interested and calls ron to express his interest. ron tells him that he is selling the computer for $400. carl offers to pay $350 and ron accepts the offer. they decide to complete the sale after three days. the next day, ron puts up another update on his facebook account stating he has decided not to sell his computer. which of the following describes ron's action of deciding not to sell his computer?

Ron's action of not deciding to sell his computer is considered to be revocation.   Revocation is the process of cancelling whatever agreement you have going on.  Even though they had plans to complete the sale, he still cancels by posting on facebook, hence why this is revocation.  He is revoking it from Carl.  

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