Paragraphs C & D

(C)
Online chat rooms have become a great source of communication. In the case of students, they provide a break from the school environment, a stress release, a way to meet new people. However, universities have begun to utilize chat rooms' communication abilities. Students can now talk with other students about help with studying, any questions they may have, and other course information. This tool has even found its way into my Biology class and lets me discuss the lectures and labs with my peers. This ability of chat rooms to create a learning environment outside of class is why they are becoming more prominent in school environments.
Whenever people are communicating over the internet, there are always concerns of security. Luckily, a lot of classes around campus have set up private chat rooms exclusive only to students registered for that class. This ensures that outsiders cannot gain access to the room.

(D)
During the Watts riots in Los Angeles, CA, police officers employed guns as means of protection, and led to the shootings of some looters and perpetrators (Knutson and Revering 64). Is there no better way of dealing with criminals than simply gunning them down? In 1979, UCLA University Officers found an alternative to the deadly force that guns cause. Dogs became the preferred method of dealing with gangs around campus housing developments. Results came fast as the gangs relocated after encounters with the canine force. Although some suspects claimed to have been bitten badly, these cases are extremely rare compared to the many documented good deeds and rescues involving human lives performed by police canines. Clearly dogs are a more suitable and effective alternative to weapons.

C- The author of this paragraph needed to separate the paragraph into two. The first needed to introduce the idea of chat rooms in schools and the second to give a reason that backs up the claim that they are beneficial to students.

D- This paragraph simply needed better organization.