If the system of equations $$x + 2y + 3z = 3$$, $$4x + 3y - 4z = 4$$ and $$8x + 4y - \lambda z = 9 + \mu$$ has infinitely many solutions, then the ordered pair $$(\lambda, \mu)$$ is equal to

A

$$\left(\frac{72}{5}, \frac{21}{5}\right)$$

B

$$\left(\frac{-72}{5}, \frac{-21}{5}\right)$$

C

$$\left(\frac{72}{5}, \frac{-21}{5}\right)$$

D

$$\left(\frac{-72}{5}, \frac{21}{5}\right)$$