Task: Question Answering
Input (English): The oil used today is made from the ancient remains of tiny sea creatures called "Diatoms." When they were alive, the Diatoms converted sunlight into stored energy. Based on this information, which of the following statements is true?  
 (A) The Sun turned diatoms into oil after 10-20 years. (B) Diatoms are the original source of energy for oil. (C) The Sun is the original source of energy for oil. (D) Diatoms converted oil into energy.
Output (English): C