I think its A im sorry if its not correct but thats what i think it is. I hope you get it right :)
The two important factor that limited the China with having
contacts with the outsiders are the following factors;
-
Long distances – the distance from outside were
a hinder in which makes it difficult and makes the contract to be limited to
the outside.
-
Natural barriers – this hinders China from
travelling because of the physical feature that protects them or hinders them
from travelling forth.
Two important, famous, well-documented battles resulted in Confederate defeats