10. Of the following, the statement that is untrue is (explain): (A) acid rain is denoted by any precipitation with a pH less than neutral (7.00), (B) acid may be deposited as acidic salts and acid gases, in addition to aqueous acids, (C) acid rain is a regional air pollution problem as distinguished from local or global problems, (D) carbon dioxide makes rainfall slightly acidic, (E) acid rain is often associated with elevated levels of sulfate ion, SO42−.