WORTH 75 POINTS
△ABC is reflected to form​​ ​ △A′B′C′ ​.


The vertices of △ABC are A(−7,1) , B(−5,−3) , and C(−3,2) . The vertices of △A′B′C′ are A′(−7,−1) , B′(−5,3) , and C′(−3,−2) .


Which reflection results in the transformation of ​ △ABC ​​ to ​ △A′B′C′ ​​?


A. reflection across the x-axis


B. reflection across the y-axis


C. reflection across y = x


D. reflection across y=−x