Based on these descriptions: True statements are A and B.
Angle LM is congruent to angle JK. This is true because, in a rotation, corresponding angles are congruent. The corresponding angles to LM in the rotated image J'K'L'M' are the same as those to JK in the original figure.
B. The measure of angle KLM is equal to the measure of angle K'L'M'.
This is true because in a rotation, angles remain the same size. The angles KLM in the original figure and K'L'M' in the rotated image have the same measure.
Based on these descriptions: True statements are A and B.