Which of the following contributed to the increased economic and military power of the Sumerians?

Question

a series of highly strategic army leaders added to
a standing army of many trained soldiersthe formation of alliances with other city-statesthe development of bronze to make weapons
Cause Effect
a series of highly strategic army leaders

Answer 1

And you think ... ?

Answer 2

what is answer]

Answer 3

The answer is the development of bronze to make weapons.

Answer 4

Thanks answer key