ONE specific example about the relationship between government and public works during the 13th century that could have led the author to conclude that those who built the Grand Canal deserve more credit than those who built the Great Wall.

im not sure on this one

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.