I believe you are correct. The answer is A) the 38th parallel.
Hope this can help.
Answer: Explanation: The correct answers are 2) Ensured equality among men and women of the same class, 3) Ensured job specialization among people, and 6) Provided a stable social structure. ... The caste system also ensured job specialization for its society, a major aspect of a complex civilization.
The answer is A. movement of energy through space or a medium