The expression 2(1 + w) is used to calculate the perimeter of a rectangle, where I is length and w is width. If the length is ⅔ unit
and the width is ⅓
unit, what is the perimeter of the rectangle in units?

A: ⅔ unit
B: 1 unit
C: 1 ⅔ units
D: 2 units

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