The Square Below Is Transformed by an Isometry

Multiple Choice

The square below is transformed by an isometry. Which of the following statements is NOT necessarily true?

A) The distance between vertex A and vertex B remain the same after transformation.
B) Vertices A, B, C, and D still form a square after transformation.
C) Vertex A is still above vertex D after transformation.
D) Vertex A is still adjacent to vertex D after transformation.