All of the
given choices are quadrilaterals. They only differ on the number of their
parallel sides. A square has 2 parallel sides and all of its sides are equal or
the same. A rhombus has 2 parallel sides and all of its sides are equal or only
two of its sides are equal. A rectangle has 2 parallel sides. One parallel side
is the same and can be bigger or smaller than the other parallel side.
Trapezoid has only one pair of parallel sides. The other pair is a mirror to
the other. So the answer is d.
