What action by ming emperors greatly improved the transport of agricultural goods in china?

rebuilding of the grand canal

rebuilding of beijing harbor

rebuilding of the great wall

rebuilding of the silk road

Two of these describe "federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a "unitary" and a "confederate" system.