If $$\tan A = \frac{3}{7}$$, then what is the value of $$\cosec A$$?

A

$$\frac{2\sqrt{10}}{3}$$

B

$$\frac{7\sqrt{10}}{20}$$

C

$$\frac{\sqrt{58}}{3}$$

D

$$\frac{\sqrt{3}}{58}$$