Triangle ABC is transformed to obtain triangle A′B′C′: Which statement is correct for and ? (5 points) because is obtained by dilating by a scale factor of and then rotating it about the origin by 180 degrees , because is obtained by dilating by a scale factor of and then rotating it about the origin by 90 degrees , because is obtained by dilating by a scale factor of and then rotating it about the origin by 180 degrees , because is obtained by dilating by a scale factor of and then rotating it about the origin by 90 degrees