Find the Term That Should Be Added to the Expression $x^{2}-\frac{2}{3} x+$

Multiple Choice

Find the term that should be added to the expression to form a perfect square trinomial. Write the resulting perfect square trinomial in factored form.
- $x^{2}-\frac{2}{3} x+$

A) $9 ;\left(x-\frac{1}{3}\right) ^{2}$

B) $\frac{1}{9} ;\left(x+\frac{1}{3}\right) ^{2}$

C) $-\frac{2}{3} x ;\left(x-\frac{1}{3}\right) ^{2}$

D) $\frac{1}{9} ;\left(x-\frac{1}{3}\right) ^{2}$