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 $$\frac{P}{Q}$$ = 1020.75 and$$\frac{ P}{(Q + 3)}$$ = 816.6, then which of the following gives the correct set of {D, Q}?

A:{6, 12}

B:{6, 15}

C:{9, 12}

D:{9, 15}

E:{15, 24}