Final answer:
After rotating the point (-5,6) counterclockwise by 180 degrees around the origin, the new coordinates become (5,-6).
Step-by-step explanation:
The question is asking for the new coordinates of the point (-5,6) after it has been rotated counterclockwise by 180 degrees around the origin. In a 180-degree rotation, every point on the plane is mirrored over the origin to its opposite quadrant. The x-coordinate and y-coordinate both change sign, so the point (-5,6) becomes (5,-6). Therefore, the correct answer is (5,-6).