Check the Following Paragraph(s) for Unity

Multiple Choice

Check the following paragraph(s) for unity. Select the number of the sentence that does not belong in the paragraph. Identify the sentence that does not belong.
(1) Bottled water is not necessarily any purer or healthier than the water you can get from your sink. (2) In fact, in many cities and towns, the testing requirements for tap water are much stricter than those for bottled water, and the bottled water may actually contain contaminants that the tap water is not allowed to have. (3) Plus, bottled water usually lacks fluoride, an important mineral that is added to tap water. (4) Another reason to drink tap water is the waste generated by consumption of bottled water. (5) While all of those empty plastic bottles can be recycled, most people just toss them into the trash, and they end up in landfills already overflowing with garbage. (6) Recycling glass, newspaper, and aluminum will also help to minimize America's waste problem. (7) Finally, bottled water costs a lot more than tap water. (8) In fact, it's often about 300 times more expensive.

A) Sentence 3
B) Sentence 6
C) Sentence 7