Which of The following tells how are civilizations contact with other civilizations affected its growth?
a. A civilization that made trade agreements with other civilizations removed the need for competition and allowed it to use unlimited resources.
b. A civilization that was conquered by another civilization avoided control of and competition for natural resources that could have been used to make trade goods.
c. A civilization could become highly complex while maintaining a nomadic lifestyle.
d. A civilization that treated with other civilizations for resources that were not nearby country goods that it produced from available resources.
