In one or two paragraphs, explain how Kublai Khan was able to successfully rule China. What decisions did he make that helped him succeed? I only need 1 paragraph. just please give an actual answer

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.