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The slopes of a quadrilateral are -1/2, 3/2, -1/2, and 3/2. What conclusion about this shape can be made?
A. The quadrilateral is a parallelogram, because there are two pairs of equal slopes, and Thus two pairs of parallel opposite sides.

B. The quadrilateral is a trapezoid, because there are two pairs of equal slopes, and thus two pairs of parallel opposite sides.

C. The quadrilateral is a parallelogram, because there is one pair of equal slopes, and thus one pair of parallel opposite sides.

D. The quadrilateral is a trapezoid, because there is one pair of equal slopes, and thus one pair of parallel opposite sides.