Task: Question Answering
Input (English): Question: Four brothers Adam, Bill, Charles and David together contributed certain amount of money and purchased a car. The contribution made by Adam is half that of the total contribution made by the other three brothers, contribution made by Bill is one-fourth of the total contribution made by the other three brothers and the contribution made by Charles is two-third of the total contribution made by the other three brothers. If the total price of the car is $9750, find the contribution made by David.

 Option A: $540

 Option B: $580

 Option C: $600

 Option D: $650

 Option E: $680
Output (English): Option D