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Why is the book most likely told in Dr. Watson's POV?
a.) Dr. Watson has a less subjective view than Holmes.
b.) Holmes would have already solved the cases in his mind before the other characters caught up with him, and all of the answers would be revealed to the reader before they have a chance to infer.
c.) Dr. Watson can show the friendship between himself and Holmes more effectively than Holmes can. Dr. Watson can also show the more emotional parts of the cases, and help the audience to connect the dots without giving away the answers.
Choice b: Holmes would have already solved the cases in his mind before the other characters caught up with him, and all of the answers would be revealed to the reader before they have a chance to infer.