Which statement is an accurate comparison of Egypt's and Mesopotamia's social hierarchies?

The accurate comparison of Egypt's and Mesopotamia's social hierarchies from the given statements is:

• In both societies, enslaved people held the least power.

This statement is true for both Egypt and Mesopotamia, as enslaved people were at the bottom of the social hierarchy in both civilizations. The other statements either contain inaccuracies or do not consistently apply to both societies. For example, in both societies, slavery was a common practice rather than being frowned upon, and the specific roles and statuses of merchants and the king may have differed between the two civilizations.