A triangle with vertices (−3, 1), (1, 5), and (4, 1) is reflected across the line y=-2. What are the vertices of the image?
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​​(A.) (-3,1) will get mapped to ​( , )
(B.) (1,5) will get mapped to ​( , )
​​(C.) (4,1) will get mapped to ​( , )