Brett Offers to Sell His Old but Functioning Cell Phone

Multiple Choice

Brett offers to sell his old but functioning cell phone to James for $65.James says he will accept the offer if Brett lowers the price to $60.James has

A) made an unequivocal acceptance.
B) made a counteroffer.
C) demonstrated the exculpatory rule.
D) entered into an option contract.
E) entered into an executory contract.