Which device shows readers that someone very knowledgeable about the subject or viewpoint agrees?

Which device shows readers that someone very knowledgeable about the subject or viewpoint agrees?

• A. Expert opinions
• B. Testimonials
• C. Bandwagon
• D. Repetition

Answer: (A)

Citing someone with real expertise signals credibility to readers. When a writer includes the opinion of a knowledgeable figure—like a professor, doctor, or researcher—it shows that an informed authority supports the viewpoint. This use of expert opinion strengthens the argument because the audience trusts the expert’s training and experience, lending weight to the claim beyond personal belief or general appeal. That’s why this option best fits. A testimonial is still persuasive, but it comes from a non-expert or consumer perspective and focuses on personal endorsement. The bandwagon relies on popularity, not any evidence or expertise, and repetition emphasizes a point without introducing authority.

Citing someone with real expertise signals credibility to readers. When a writer includes the opinion of a knowledgeable figure—like a professor, doctor, or researcher—it shows that an informed authority supports the viewpoint. This use of expert opinion strengthens the argument because the audience trusts the expert’s training and experience, lending weight to the claim beyond personal belief or general appeal.

That’s why this option best fits. A testimonial is still persuasive, but it comes from a non-expert or consumer perspective and focuses on personal endorsement. The bandwagon relies on popularity, not any evidence or expertise, and repetition emphasizes a point without introducing authority.