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Triangle ABC is rotated to form ​ △A'B'C' ​.


The coordinates of point A are (1, 1) , the coordinates of point B are (3, 1) , and the coordinates of point C are (1, 4) .


Which rotation around the origin results in the transformation of ​ △ABC ​​ to ​ △A'B'C' ​?

Arotation of 90 degrees
Brotation of 180 degrees
Crotation of 360 degrees

Triangle ABC is rotated to form A B C . The coordinates of point A are (1, 1) , the coordinates of point B are (3, 1) , and the coordinates of point C are (1, 4 class=