Given that line segments are taken to line segments of the same length during rigid transformations, which transformation maps the line segment ab onto itself? the line is -2,1 and 4,3 a) rotation counterclockwise of 90° → x-axis reflection → rotation counterclockwise of 270° → x-axis reflection b) rotation counterclockwise of 90° → y-axis reflection → rotation counterclockwise of 270° → y-axis reflection c) rotation counterclockwise of 90° → x-axis reflection → rotation counterclockwise of 270° → y-axis reflection d) rotation counterclockwise of 180° → x-axis reflection → rotation counterclockwise of 270° → y-axis reflection