31. A parallelogram has vertices at P (2, -3), Q (2, 2), R (5,

6), and S (5, 1). Which of the below are correct for the

parallelogram PQRS? Select all that apply.

A. The parallelogram is not a rhombus because the slope

of QR = the slope of PS.

B. (slope of QS): (slope of PR) = -1

C. The parallelogram is a rhombus

because QR = RS = SP = PQ.

D. The parallelogram is not a rhombus because QP = RS.