ANSWER
D. 2 units
EXPLANATION
The expressions for the perimeter is;
[tex]P = 2(l + w)[/tex]
The length of the rectangle is
[tex]l = \frac{2}{3 } \: units[/tex]
and the width of the rectangle is,
[tex]w = \frac{1}{3} [/tex]
We substitute these values into the formula to obtain,
[tex]P =2 ( \frac{2}{3} + \frac{1}{3} )[/tex]
We simplify the equivalent fractions in the bracket to obtain,
[tex]P =2 ( \frac{2 + 1}{3})[/tex]
[tex]P =2 ( \frac{3}{3})[/tex]
[tex]P =2 ( 1)[/tex]
[tex]P =2 \: units[/tex]