Mark each statement if it correctly describes facts about China during the Sui dynasty.
A. Under the Sui dynasty, China entered a golden age.

B. The Sui dynasty reunited China in the sixth and seventh centuries by combining existing laws into a single legal code.

C. The Grand Canal was constructed to unite northern and southern China.

D. The Sui united northern and southern China, but the new empire was too big to govern effectively.

E. One reason that Chinese peasants were ready to rebel is that the emperor had used them as forced labor to achieve his goals.