In sentence 13 (reproduced below), the writer wants to include a piece of relevant evidence that will help convince the reader to accept the techniques used by Warren Buffet as credible. Fortunately, there are techniques, like those used by Warren Buffett (born in Omaha, Nebraska, in 1930) when he makes his financial decisions that can minimize the risks of confirmation bias.
Which of the following versions of the underlined portion of sentence 13 best accomplishes this goal?
A) (as it is now)
B
whose ability to tell a story is legendary to
C
one of the most successful investors in history
D
a noted philanthropist
E
whose father was a member of the United States Congress

The appeal to a person's credibility in a subject matter should be used in this case. The version of the underlined portion of sentence 13 that best accomplishes this goal is;

If you wish to convince a person that the financial techniques promoted by a person are effective, you will have to show how the individual applied this personally and benefited. This is ethos - appeal to credibility.

Since Warren Buffet is one of the most successful investors in history, anyone will be more given to believe that his financial techniques are effective.

Summarily, sentence C highlights the use of ethos.

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C. one of the most successful investors in history

Explanation:

The version of the underlined portion of sentence 13 that best accomplishes the goal of convincing the reader to accept the techniques used by Warren Buffet as credible is option C.

This is because, stating that he is one of the most successful inventors in history gives him credibility and authority on the subject.

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