The gold standard is B) a system in which a country's money is backed with gold.
It is a monetary system where a country's currency or paper money has a value directly linked to gold.
The end of the Han Dynasty was the result of a series of revolts by palace eunuchs who had begun to grow in power.
Answer:
C.
he was NOT measuring an innate, fixed level of mental ability.
Explanation:
It made it easier to transport materials to all of the cities
