Final answer:
The question involves determining which geometric transformation would prove two rectangles congruent, likely involving translation, rotation, or reflection.
Step-by-step explanation:
The question refers to proving the congruence of two rectangles using a transformation.
Congruence transformations in geometry include translation, rotation, reflection, or a combination of these.
To determine which transformation can prove rectangles ABC and KLMN congruent, one would need to analyze the positions and orientations of the rectangles on the coordinate axes.
Since specific details about the orientation and position of the rectangles are not provided, a general answer cannot be accurately given.
However, in most cases, proving congruence would involve applying one or more of the following transformations: translation to align the positions of the two rectangles, rotation to match their orientations, and reflection if one rectangle is a mirror image of the other.