Question

sumerians were the first people of mesopotamia to use , A. the plow , B.irrigation , C.a spoken language , D. a number system based on 100 ?

Answer 1

The best answer is B. irrigation: they are known to develop an irrigation system (although the Egyptians also developed it at a similar time).

A potential confusing answer is the answer C - but they were the first to develop a written language, not a spoken language.