<span>1.The Chinese did not have any more uses for a navy.
2.The voyages were becoming to expensive.
3.They wanted to divert their attention to stopping the Mongolians.
4.The Chinese began to adopt a policy of isolationism and did not want to interact with anyone.</span>https://answers.yahoo.com/question/index?qid=20130423165801AABEmGv
Answer:
1830-1860. Have a nice day :-)
Explanation:
The correct answer is A.
The most important contribution the Americans took from the Romans is the idea of a representative government in which people elect officials to speak for them. It is important to have in mind that the fundamentals of democracy and the concept of individual right are also Roman heritage.