Which of the following ports is MOST likely used for high-end graphics cards?（）

A user has purchased a laptop that has no means to charge the battery. Which of the followingwould the user MOST likely purchase?（）

A. USB cable
B. AC adapter
C. PCMCIA card
D. Replacement battery

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Which of the following is the NEXT step in the troubleshooting theory after identifying the problem?（）

A. Establish a theory of probable cause
B. Test the theory
C. Implement preventative measures
D. Establish a plan of action

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