If $$3^x = 4^{x - 1}$$, then x =

A

$$\frac{2 \log_3 2}{2 \log_3 2 -1}$$

B

$$\frac{2}{2 - \log_2 3}$$

C

$$\frac{1}{1 - \log_4 3}$$

D

$$\frac{2 \log_2 3}{2 \log_2 3 - 1}$$