What is the value of $$\frac{9x^2 + 12xy + 4y^2}{36}$$?

A

$$\left(\frac{x}{3} + \frac{y}{2}\right)^2$$

B

$$\left(\frac{x}{2} - \frac{y}{3}\right)^2$$

C

$$\left(\frac{x}{2} + \frac{y}{3}\right)^2$$

D

$$\left(\frac{x}{4} + \frac{y}{3}\right)^2$$