Task: Question Answering
Input (English): Which of the following correctly explains how atmospheric nitrogen is converted to nitrogen compounds used by living organisms?  
 (A) Sunlight converts atmospheric nitrogen to a form usable by protists. (B) Plant leaves convert atmospheric nitrogen to a form usable by animals. (C) Bacteria in soil convert atmospheric nitrogen to a form usable by plants. (D) Invertebrate animals in soil convert atmospheric nitrogen to a form usable by fungi.
Output (English): C