The answer is that if polygon ABCD rotates 90 counterclockwise
to create a'b'c'd', then the coordinates of d will be at the location (-2, 2)
and if the polygon ABCD rotates 180 clockwise to create a'b'c'd'
the coordinate of A will become (3,-1).
I think the correct answer is B. It is the triangle case SSA that may have one, two, or zero solutions. This case can have either number of solutions but it depends on the sides of the triangle given. Having one solution can be all of the cases except SSS, having 2 solutions can only be applied to SSA.