Task: Question Answering
Input (English): Question: P and Q are both positive integers. When P is divided by Q, the remainder is some positive integer D, and when P is divided by (Q + 3), the remainder is also D. If P/Q = 1020.75 and P/(Q + 3) = 816.6, then which of the following gives the correct set of {D, Q}?

 Option A: {6, 12}

 Option B: {6, 15}

 Option C: {9, 12}

 Option D: {9, 15}

 Option E: {15, 24}
Output (English): Option C