Answer: The correct choice is
(A) The angles of ABCD and KLMN corresponding to each other are equal, but the sides of ABCD are half the length of those in KLMN.
Step-by-step explanation: It is required to identify which statement reflects the potential truth if the polygons ABCD and KLMN are similar.
Two polygons are considered SIMILAR when their corresponding angles are congruent and the sides are in proportion.
Hence, options (B), (C), (D), and (E) are incorrect since they contradict the principles of similarity.
In option (A), we see
The angles of ABCD and KLMN that correspond are equal. Thus, they must be congruent.
Moreover, the lengths of corresponding sides of ABCD are half those of KLMN.
Thus, we can deduce

Consequently, the corresponding sides are proportional.
Therefore, option (A) holds true if the two polygons are similar.