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how were the economies of ancient mesopotamia, egypt, and the indus valley similar?

a. most of their populations were enslaved.
b. they issued coins as money.
c. they relied very little on trade.
d. they all relied on farming.

I think it is D {They relied on farming}

Explanation:

Its late it was in 2019 but sorry

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.