Answer: Choice C. (-3,2)
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To get this answer, you first reflect (2,3) over the line y = x. This will have you swap x and y coordinates. So we go from (2,3) to (3,2).
Now reflect over the y axis. We simply change the sign of the x coordinate from positive to negative. The y coordinate stays the same. We go from (3,2) to (-3,2)
The chain of points is
(2,3) --> (3,2) --> (-3,2)