Which statement about the sui dynasty is correct? a. it proclaimed islam as the state religion of china in the ninth century. b. it reunited northern and southern china in the sixth century. c. it began building the great wall of china in the third century b. c. d. it fell to the forces of genghis khan in the twelfth century.

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

the answer is c. they believed the royal family should hold all the power.