This is because iron is more reactive than copper in the metal reactivity series.
Answer:
I took this test and got a 100, it should be:
(B) develop complex societies.
Hope this helps :)
I think they went to Idaho.
Emperor Wu-ti launched attacks against groups that pose threats against the empire. He deemed this the right decision to solve the problem right away. He was determined to win and sent troops after troops into the battlefield. Because of this, he was able to expand China's control. On another hand, he also exhausted their resources due to allocating most of the empire's income to the military forces. He needed to look for another way to expand their income. He did this by passing a decree that the state can monopolize the salt, wine, and iron.
