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i would say the C is the answer. Correct?

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Switches in series form an AND operation. Switches in parallel form an OR operation.

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@ Ataraxia : so a is the answer – MethodManX Jul 29 '13 at 23:15
@MethodManX yes – Ataraxia Jul 29 '13 at 23:16
thanks! i knew i was doing something wrong – MethodManX Jul 29 '13 at 23:24
@MethodManX No problem. – Ataraxia Jul 29 '13 at 23:34

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