C.
Jackson was long dead by World War I.
A: Pro-slavery settlers who came to Kansas from the neighboring state of Missouri
The United States and Great Britain believed that the liberated nations of Eastern Europe should C. Join the Soviet union.
Shi Huangdi was an effective leader because he was the first Chinese emperor that managed to unite the northern China and responsible to the first development of China's great wall.
Not only that, he is also the one that introduces China to the usage of money as a medium of transaction.