Task: Question Answering
Input (English): A gasoline is advertised as "releasing fewer pollutants" when it is used in cars. For this claim to be accurate, what has most likely happened to the gasoline?  
 (A) Its acidity has been increased. (B) More oxygen has been dissolved in it. (C) Impurities have been removed. (D) Its molecules have higher chemical energies.
Output (English): C