Task: Question Answering
Input (English): Which statement best explains why summer days are warmer than winter days in Arkansas?  
 (A) The Sun is closer to Earth in the summer than in the winter. (B) The Sun has more sunspots in the summer than in the winter. (C) Earth's western hemisphere is tilted toward the Sun during the summer. (D) Earth's northern hemisphere is tilted toward the Sun during the summer.
Output (English): D