Directions: Each set of lettered choices below refers to the numbered questions or statements immediately following it. Select the one lettered choice that best answers each question or best fits each statement. A choice may be used once, more than once, or not at all in each set. The following questions refer to the energy sources listed. (A) Uranium-238 (B) Coal (C) Natural gas (D) Oil (E) Solar Currently proven global reserves are expected to be largely exhausted within the next 50 years.1. Is primarily responsible for acid rain in northeast United States2. Is renewable3. Currently proven global reserves are expected to be largely exhausted with in the next 50 years4. Occurs naturally in bedrock and leads to the formation of radon