The expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. If the length is Fraction 2 over 3 unit and the width is Fraction 1 over 3 unit, what is the perimeter of the rectangle in units?
a) 2 over 3 unit
b) 1 unit
c) 1 and 2 over 3
d) 2 unit