Expand and Multiply $\left(\frac{2}{3}\right)^{2}$ A) $\frac{2}{3}$ B) $\frac{16}{81}$ C) $\frac{8}{27}$ D) $\frac{4}{3}$ E) $\frac{4}{9}$

Expand and multiply. $\left(\frac{2}{3}\right) ^{2}$

A) $\frac{2}{3}$
B) $\frac{16}{81}$
C) $\frac{8}{27}$
D) $\frac{4}{3}$
E) $\frac{4}{9}$