Find the Term That Should Be Added to the Expression $x^{2}+\frac{2}{5} x$

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.
- $x^{2}+\frac{2}{5} x$

A) $\frac{1}{25} ;\left(x+\frac{1}{5}\right) ^{2}$

B) $\frac{1}{25} ;\left(x-\frac{1}{5}\right) ^{2}$

C) $25 ;\left(x+\frac{1}{5}\right) ^{2}$

D) 0 ; $\left(x-\frac{1}{5}\right) ^{2}$