Find All of the Square Roots of the Perfect Square $\frac{4}{9}$

Multiple Choice

Find all of the square roots of the perfect square $\frac{4}{9}$ .

A) $\frac{2}{3}$
B) $\pm \frac { 8 } { 27 }$
C) $\frac { 1 } { 2 }$
D) $\pm \frac { 2 } { 3 }$
E) $\pm \frac { 3 } { 4 }$