It is interrogative because a question is being asked. It is usually interrogative if there is a question mark at the end.
Answer:
I believe it is C
Explanation:
I think it is C because they address Matt as he.
First, Sherlock realized it was weird that Mr. Wilson's assistant pushed for him to join the league. Then he realized when the league accepted Wilson so easily, considering he wasn't married and owned a business. Also, the job itself was very peculiar. Sherlock also saw the knees of Wilson's assistant's pants, they were worn indicating he had been on his hands and knees.
Thats all i know^_^
