Shawndra is correct
She made two statements, and both are true:
1. It is not possible to draw a trapezoid that is a rectangle.
This is true because a trapezoid is a quadrilateral that has exactly one pair of parallel sides, whereas a rectangle is a parallelogram (i.e. it has two pairs of parallel sides)
2. It is possible to draw a square that is a rectangle.
This is true because a rectangle refers to any parallelogram with right angles. A square is also a parallelogram (has two pairs of opposite sides) with right angles. In fact, all squares are rectangles; only that they are a special kind of rectangle, where all the sides are equal in length.