In the end of The Hound of the Baskervilles, Sherlock Holmes appears with evidence Dr. Watson was unaware of to solve the mystery. What earlier scene in the novel does this mirror?
A. Holmes checking if the man following Sir Henry is staying in the same hotel.
B. Mr. Barrymore explaining his relationship with the convict.
C. Watson and Holmes discussing the cane.
D. Sir Henry explaining that his boot is missing.