Answer:
The correct statements about China during the Sui dynasty are:
The Sui united northern and southern China, but the new empire was too big to govern effectively.
The Grand Canal was constructed to unite northern and southern China.
The Sui dynasty reunited China in the sixth and seventh centuries by combining existing laws into a single legal code.
The correct definition of the word "bureaucracy" is:
A group of officials who help run a government or other organization.
The strategies or policies that governments have used throughout history to unite their nations include:
Unifying the legal code
Accepting religious toleration
Standardizing weights and measures
Feudalism, while a system of governance, was not typically used to unite nations; it was more often used to organize and govern regions within a nation.
Step-by-step explanation: