Based on the information given, it is likely that Sunee used a non-proportional scaling method to enlarge her drawing of the cat, which caused the distortion in the final image.
Non-proportional scaling methods change the size of an object in one dimension more than in another, leading to a stretched or squashed appearance. This is in contrast to proportional scaling methods, which increase or decrease the size of an object in all dimensions by the same factor, resulting in an image that retains its original proportions.
Therefore, the true statement about the transformation applied to Sunee's drawing of the cat is that a non-proportional scaling method was used, resulting in a distorted image.