Q173. The sentence below contains an error in its opening phrase. Choose the option that correctly begins the sentence.Original sentence: If the problem of pollution—air, water, noise, etc.—is important, indeed vital, to every American is a fact that we all know but that many of us are choosing to ignore.English — NUST Mock 6 — Question 173 of 200A. If the problem of pollutionB. That the problem of pollutionC. How the problem of pollutionD. When the problem of pollutionE. Because the problem of pollutionPractice more English MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →