Task: Question Answering
Input (English): Mosquitoes have adapted to detect carbon dioxide using certain sensory nerves. Mosquitoes instinctually move toward greater concentrations of carbon dioxide. What is the importance of this adaptation?  
 (A) It helps mosquitoes find food. (B) It helps mosquitoes find mates. (C) It helps mosquitoes find clean air. (D) It helps mosquitoes find shelter.
Output (English): A