China was able to trade more than ever during the postclassical era because: a. foreign countries gave china new technologies
b. Chinese people began to move to huge cities in Europe
c. miners discovered new sources of gold in china
d. China's government built better roads and canals.

Which two statements are true about native american tribes during the civil war? the war caused native american tribes to sign treaties and side with union forces who promised to develop indian territory. the war united the tribes against the confederacy, which wanted to secede from the union and continue slavery. the war created conflicts within the tribes because some wanted to stay loyal to the union, while others wanted to support the confederacy. the war made the tribes forget their differences and come together against the union forces who wanted to abolish slavery in indian territory. the war led native american tribes to sign treaties with the confederacy, which promised to protect the tribes and their interests in exchange for support in the war.