Read the following context and choose the best option to answer the question.
Context: This makes me happy . I guess there was smoke on the second floor that set off the alarm and brought the attention of two fire trucks . I ' m guessing someone brought in fake smoke and set off the alarms for April fools . I would really like to thank that person . Since I ' m waiting around until the rest of my group is done with their other class I decided that I would walk up to the Bursars office and figure out what was going on with my bill .
Question: Why was there smoke on the second floor ?
Options: 
- Someone set their dorm on fire .
 - None of the above choices .
 - Someone was playing a prank .
 - Someone was smoking indoors .


Someone was playing a prank .