Which statement below is not true?
A. All rhombus' are parallelograms because the opposite sides are parallel.
B. All rectangles are parallelograms because the opposite sides are parallel.
C. All rectangles are squares because they have 90 degree angles, the opposite sides are parallel and all the sides are congruent.
D. All squares are rectangles because both are quadrilaterals, have 90 degree angles and the opposite sides are parallel.