Dr. Rosenfeld is the doctor on Sunday House Call, a Sunday m…

Dr. Rosenfeld is the doctor on Sunday House Call, a Sunday morning health program on a major news channel. Dr. Rosenfeld is highly esteemed in his field and provides up-to-date medical information for viewers. Sometimes he recommends specific products, and Valerie, a regular viewer of the program, trusts what he says or recommends because he doesn’t seem to have an apparent motive to mislead viewers. Which characteristic does Dr. Rosenfeld possess?