Which type of evidence uses the viewpoint of someone with authority on a topic?

A. Data
B. Expert opinion
C. Anecdote
D. True example

B. Expert opinion

B. Expert opinion

The type of evidence that uses the viewpoint of someone with authority on a topic is B. Expert opinion.

To arrive at this answer, we can analyze the options provided:

A. Data: Data refers to facts, statistics, or information that is collected and analyzed to support claims or conclusions. While data can provide objective evidence, it typically does not involve the viewpoint or opinion of an authority figure.

B. Expert opinion: Expert opinion involves the viewpoint or perspective of individuals who are considered authoritative or knowledgeable in a particular field. This type of evidence depends on the expertise, credentials, or experience of an individual to support or validate a claim.

C. Anecdote: Anecdotes are personal stories or experiences that may provide entertaining or interesting examples. However, they are not rooted in authority or expertise on a topic. Anecdotes are generally considered weak evidence in terms of supporting a claim.

D. True example: The term "true example" is not a commonly used phrase when discussing evidence types, but if we interpret it as an example that accurately represents the situation or topic, it does not necessarily rely on the viewpoint of an authority figure.

Therefore, the answer is B. Expert opinion, as it specifically involves the perspective of someone with authority or expertise on a given topic.