^ Casey was able to map line segment UV onto line segment ST using a translation and a rotation.

Casey concluded:

"I was able to map line segment UV onto line segment ST using a sequence of rigid transformations without a dilation, so the figures are congruent but they are not similar."

What error did casey make in her conclusion?

A. The correct conclusion is that the segments are congruent and similar.
B. The correct conclusion is that the segments are neither congruent, nor similar.
C. There is no error. This is a correct conclusion

Which one is it please?