Read the paragraph below, and then answer the question. It may contain errors. 1) There can be many benefits to drinking tap water instead of bottled water. 2) Fluoride helps to promote healthy teeth, but is eliminated in bottled water due to the process of osmosis or distillation. 3) Most tap water contains fluoride. 4) Another way healthy teeth can be maintained is by visiting a dentist regularly. 5) In addition, the Environmental Protection Agency (EPA), which regulates tap water, has stricter standards than the Federal Drug Administration (FDA), which regulates bottled water. 6) Although some opponents of tap water claim that it is unsafe to drink due to an unsafe amount of lead, the strict standards of the EPA ensures that the levels of lead in the water are safe for consumption.

Which sentence should be eliminated because it does not relate to the main idea of the paragraph?

A) sentence 2

B) sentence 4

C) sentence 5