During the Han Dynasty,
unifying principles for society
was a major system of
that served as a set of
A trade route known as the
connected the Han Dynasty with the
innovations, including sundials, water clocks, and the use of
The Hans were responsible for many

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.

d. china

good luck

d is the best choice