Laptop computers are made with batteries, but they must also be plugged into outlets to charge the batteries. which is true regarding laptops? 1.they run only on alternating current.2.they run only on direct current.3.they can run on either direct or alternating current.4.they do not run on direct or alternating current.

The answer is C. This is because you cam recharge the battery (plug it in wall) and use the computer without charging when the battery is full. Same thing with phones.

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c) both a and b.