Which of the following did not happen during the Song Dynasty? A
the invention and use of gunpowder

B
the introduction and use of printed money

C
a boom in landscape painting and other forms of art

D
the construction of the Grand Canal

I WILL GIVE BRAINLIEST OUT FOR THE TWO ANSWERS.

Which statement best represents an economic weakness of the national government under the articles of confederation? a. the national government was unable to collect taxes. b. national and state taxes combined were too high for most services to pay. c. congress set different tax rates for each state, leading to conflict. d. state refused to collect taxes on behalf of the national government