Choose the sentence that best combines each pair of sentences in the following question. - He doesn't know hot to use a computer. As a result, he cannot find a good job. A. If he knows how to use a computer, he can find a good job. B. If he knew how to use a computer, he could find a good job. C. If he had known how to use a computer , he could have found a good job. D. If he had known how to use a computer, he could find a good job.

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