Read the paragraph.

The question of whether or not to allow cell phones in school is an important one. Cell phones are a monumental distraction to young people whose attention should be focused on learning. However, they do serve a purpose in that phones allow students to communicate with their parents. Plus, cell phones are great for taking pictures with friends. In all, cell phone use at school must be carefully regulated.

Which best explains the inconsistency in writing used in this paragraph?
It does not maintain a single point of view.
It does not maintain appropriate verb tense.
It does not maintain the same tone throughout.
It does not maintain the same style throughout.