TOEFL Reading: ETS-TOEFL阅读机经 - X43H3631015DJY8DL$

In paragraph 5, why does the author provide the information that all Egyptian villages and towns were located near the Nile and had equal access to the river A. To explain why flooding was a frequent problem for the Egyptian people B. To identify a contributing cause of the dispersal of Egypt's population C. To support the claim that Egypt had well-defined borders D. To demonstrate the similarity between Egyptian and Mesopotamian settlement patterns