$$\left(1 + \frac{2}{3}\right) \div \left[\left(1 + \frac{2}{3}\right) \div \left(\frac{2}{3} + 1\right)\right] = ?$$

A

$$\frac{4}{3}$$

B

$$\frac{3}{4}$$

C

$$\frac{12}{25}$$

D

$$\frac{25}{12}$$