The presence of plumbing systems suggests that the Indus Valley cities: 1.had strong central governments to plan.
2.produced enough surplus to allow for differentiation in jobs.
3.valued cleanliness.
4.All of the choices are correct.

Enockse detailsclashbelfiin egyptian hieroglyphics, the symbol o means "house," and the symbol t means "life." when these symbols arecombined, you get the word- translated into english, thisto store documents.based on this information, what is the most likely modern meaning oforaranslate, which referred to a places means house 01es. usiafull.enliebeio buildinghouseo libraryo file