How did the emperors use of state authority and power help build and maintain his empire
A) His subjects all had to learn how to create silk so that e could have as many robes as possible
B) His subjects all had to eat the same food to make farming easier
C) His subject (men and women) all had to become soldiers so they could conquer Egypt
D) His subject all had to use the same money, measurements and writing to lessen confusion and unite the states.