A spherical balloon is filled with $$4500\pi$$ cubic meters of helium gas. If a leak in the balloon causes the gas to escape at the rate of $$72\pi$$ cubic meters per minute, then the rate (in meters per minute) at which the radius of the balloon decreases $$49$$ minutes after the leakage began is

A

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

B

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

C

$$\frac{2}{9}$$

D

$$\frac{9}{2}$$