Task: Question Answering
Input (English): A researcher observes that an organism placed in a glass container filled with water moves away when a penlight is focused on the container. The researcher concludes that the organism is light sensitive. Which other explanation for the organism's response to the light is most possible?  
 (A) The organism avoids radio waves. (B) The organism avoids gamma rays. (C) The organism moves away from vibrations. (D) The organism moves away from heat sources.
Output (English): D