Primary sources a. interpret and analyze other primary sources b. analyze computer and internet sources c. provide firsthand testimony or direct evidence d. can only be found in public and university libraries

The answer is option C "provide firsthand testimony or direct evidence." Primary sources are main sources of information that helps describe a historical event. Primary sources provide firsthand testimony or direct evidence on what happened during that event.

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The Answer that makes sence is C. Provide firsthand testimony or direct evidence