The two types of sources are maps and artifacts
Answer: When a political leader applies laws to the general populace that does apply to said leader
Explanation:
The correct answer is: the Chinese invented the odometer, which was used for measuring distances traveled.
An odometer or odograph is an instrument used for measuring the distance travelled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two. Early forms of the odometer existed in the Ancient China.
I believe that historians have found artifacts that the Indus Valley Civilization made in the area the Sumerians were. There also might have been written evidence.
While not school related, I believe the answer is 31.<span />
