Final answer:
The question lacks context to accurately determine the length of line segment AA''. Additional information about the relationship between AA'' and the distance between points K and M is required for an accurate answer.
Step-by-step explanation:
The question does not provide sufficient context to determine the length of line segment AA''. Specifically, it is missing the relationship between line segment AA'' and the provided distance between points K and M. Without this information, it is not possible to deduce the length of AA''. If the length of AA'' is meant to be dependent on the distance between K and M, please provide additional details regarding their relationship. Without such context, answering which option (A, B, C, or D) is correct for the length of AA'' would be speculative.