单选题
There were 36,000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold, 9 times as many paperback copies as hardback copies were sold, if a total of 441, 000 copies of the novel were sold in all, how many paperback copies were sold? (A) 45,000 (B) 360,000 (C) 364,500 (D) 392,000 (E) 396,900