Question

Sumerians were the first people of Mesopotamia to use

the plow.
irrigation.
a spoken language.
a number system based on 100.

Answer 1

i think ether a or b

Answer 2

i would say a spoken language, based in the fact that they needed some sort of way to communicate, and that also is supported by the Sumerian Tablets, which shows evidence of some sort of literature/ writing aspect.

Answer 3

it not spoken language

Answer 4

it is the plow