Bok Buys an Espresso Machine from Coffee Gadgets, Which Bills

Multiple Choice

Bok buys an espresso machine from Coffee Gadgets, which bills him for $100. He writes out a check drawn on Dios Bank, but later, believing that the machine is defective, issues a stop-payment order. Dios

A) is liable to Coffee Gadgets for the amount of the check.
B) must stop payment if the bank has a reasonable time to act.
C) need not follow Bok's order because it was issued after the check.
D) need not follow Bok's order unless the check was certified.