Nancy, Katie, John, and Reed were reading the same book. They each finished reading $\frac{5}{7}, \frac{5}{9}, \frac{5}{6}$ and $\frac{5}{8}$ of the book, respectively. Who finished reading more pages? 
选项为:A:Nancy  B:Katie  C:John  D:Reed  请回答其中一个选项.