The event in the story that is a key detail in Holmes’s solution of the case is "<span>a. the observation that Mr. Wilson belonged to the Freemasons" since this was the society that had raised suspicions before. </span>
A little late, yes, but the answer is C. Alliteration.
hope this helped! <3
C. podium because a podium is an OBJECT and NOT an adjective. ;-)
I hope I helped! =D
