He says it should be to "advance to power of England."
The answer that best applies to both the Tang and Song dynasties would be C. A Reliable food production and distribution system. This gave both dynasties the ability to thrive.
Because the south in large part were built on slaves. They didn't have factories or anything like the north did. They had cotton and assorted vegetables. In large part many will say that is also what lost them the war.
because they thought that the desease came from crows
