If $$A = \begin{bmatrix}2x + 3 & -4 \\x + 7 & 2 \end{bmatrix}$$ and if det A = 0, then x =

A

$$\frac{17}{4}$$

B

$$\frac{14}{7}$$

C

$$\frac{-14}{7}$$

D

$$\frac{-17}{4}$$