Read the summary of the passage. Bob Houston believes there is an intruder hiding in his office building. When his office door is jammed shut by a sliver of steel, he sets off in search of the trespasser. Bob finds an unlocked office that has been searched and destroyed.

A. Bob Houston believes there is an intruder hiding in his office building. When his office door is jammed shut by a sliver of steel, he sets off in search of the trespasser. Bob finds an unlocked office that has been searched and destroyed.

While Bob is searching, the mystery person again traps Bob in the vandalized room after narrowly escaping being caught.

While Bob is searching, the mystery person again traps Bob in the vandalized room after narrowly escaping being caught.

B. Bob borrows a flashlight from the security guard and begins to search the corridors for the person who blocked his office door.

Bob borrows a flashlight from the security guard and begins to search the corridors for the person who blocked his office door.

C. Bob’s suspicions are confirmed when he notices that someone has removed the handkerchief from his office doorknob and opened his door.

Bob’s suspicions are confirmed when he notices that someone has removed the handkerchief from his office doorknob and opened his door.

D. When Bob yells for help, the security guard does not see anyone run past him because he is asleep on the job.

When Bob yells for help, the security guard does not see anyone run past him because he is asleep on the job.