When the following fractions are arranged in ascending order of magnitude, the middle one is
$$\frac{2}{3}, \frac{5}{7}, \frac{9}{13}, \frac{9}{14}, \frac{7}{9}$$

A

$$\frac{2}{3}$$

B

$$\frac{5}{7}$$

C

$$\frac{9}{13}$$

D

$$\frac{7}{9}$$