The largest among the numbers $$\sqrt{7} - \sqrt{5}, \sqrt{5} - \sqrt{3}, \sqrt{9} - \sqrt{7}, \sqrt{11} - \sqrt{9}$$ is

A

$$\sqrt{7} - \sqrt{5}$$

B

$$\sqrt{5} - \sqrt{3}$$

C

$$\sqrt{9} - \sqrt{7}$$

D

$$\sqrt{11} - \sqrt{9}$$