Although he was not aware of it at the time, it was the first piece of evidence in a mystery which was to pull him deep into its folds and require weeks of patient effort to untangle. How does the author’s use of foreshadowing create tension in the passage?

A. by conveying the steps required to solve the identity of the trespasser
by conveying the steps required to solve the identity of the trespasser

B. by creating confusion about the reliability of Bob Houston as a witness to the supposed crime
by creating confusion about the reliability of Bob Houston as a witness to the supposed crime

D. by highlighting the importance of the small item as a signifier of a larger, more complex occurrence
by highlighting the importance of the small item as a signifier of a larger, more complex occurrence

D. by portraying Bob Houston as insignificant to the circumstances surrounding the secrecy in the office building