D) In a recent survey, 22 percent of students reported that they had received a hurtful text message from someone at school.
Explanation:
Option D is the only one that is related to the paragraph's topic. The paragraph wants us to take a side, it tells the audience that cell phones are used in classrooms in harmful ways. Therefore, the evidence needs to show that this is true, by telling us that 22 percent of students have received hurtful text messages, the statment gets a solid support. We realize that the number is high enough to attend this issue.
The other options just give statistics of cell phone's use without any relation to the topic here described.
