Derek consumes a protein-rich drink before and after his workouts. He told his workout partner that he became 200% stronger within a couple of months after he added the drink to his diet. His report about the positive effects of the special drink is an example of a(an) .a. testimonial
b. scientific conclusion
c. anecdote
d. peer review

C) anecdote

Explanation:

An anecdote refers to a very short story which explains something about the topic being discussed. The anecdote reflects the personal experience and one's perspective which explain the usefulness of the topic. The anecdotes are used after the professional statements does not make an influence on the other person.

In the given question, Derek explains the anecdote as his statements are based on the personal experience which is not scientifically proved. He explained the positive effects of taking special drinks.

Thus, Option-C is correct.