Task: Question Answering
Input (English): Question: There are five boxes in cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% higher than the weight of the third box, whose weight is 25% higher than the first box's weight. The fourth box at 350 kg is 30% lighter than the fifth box. Find the difference in the average weight of the four heaviest boxes and the four lightest boxes.

 Option A: 51.5 kg

 Option B: 75 kg

 Option C: 37.5 kg

 Option D: 112.5 kg

 Option E: None of these
Output (English): Option B