Final answer:
The statement that expertise and trustworthiness enhance source credibility is correct. Trustworthy sources are unbiased, well-informed, and authored by experts, providing valuable support for research.
Step-by-step explanation:
The correct statement concerning source credibility is: c. Expertise and trustworthiness enhance source credibility. Credible sources are characterized by certain features, such as the authority and expertise of the author, the absence of bias, and the presence of supporting evidence. Sources that are created by experts and are honest, unbiased, well-informed, and clearheaded are considered trustworthy. Such sources provide valuable information that can be used to support arguments and claims in research.
It's also important to identify biases or lack of authority within sources, as this can affect their reliability and usefulness in academic work.