Which statements about China during the Sui dynasty are true?

Choose all answers that are correct.

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

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

C)Under the Sui dynasty, China entered a golden age.

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

definite answers:

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

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

maybe answers:

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

Explanation:

i know its definitely not c, due to the tang dynasty being the dynasty china entered its golden age.

urbanities in the northeast and midwest lost political power.

c. troops marched forward in close formation against newer, more accurate weapons