I have some questions may you please help me with this. Thanks and the people who get it right gets brain list

Which of the following is not true of the xiongnu empire? burial mounds included glass beads and mirrors made from the sands throughout the region. there was more cooperation through trade between the tribes. other tribal units that were eventually assimilated were indo aryan, xianbei, hunyu, scythina and han chinese. as each nomadic tribe and civilization was conquered or absorbed into the larger empire, the xiongnu were able to hold more territory.

Which of the following explains why scarcity is a basic fact of life a. demand will always be greater than supply b. technology has not advanced far enough yet c. there will always be too many people on earth d. people cannot make good allocation decisions

The first time that unmanned underwater "gliders" were used by ocean scientists to respond to an oil spill was after the