What is the difference between the greatest and the smallest of the fractions $$\frac{5}{8}, \frac{3}{4}, \frac{4}{7}, \frac{2}{3}, \frac{5}{9}$$?

A

$$\frac{5}{28}$$

B

$$\frac{7}{36}$$

C

$$\frac{1}{9}$$

D

$$\frac{5}{72}$$