This empire was one of the first to use chariots as combat weapons.
a. egyptians
b. hittites
c. sumerians
d. chinese

"Sumerians" was the empire among the choices given in the question that was one of the first to use chariots as combat weapons. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has come to your help.