Why is it impossible for ships to sail from Africa's interior to the sea? A. Tributaries interrupt the river's flow. B. Mountains interrupt the river's flow. C. Waterfalls or rapids interrupt the river's flow. D. Rift Valley interrupt the river's flow.

Which is relatively better: a score of 76 on a psychology test or a score of 22 on an economics test? scores on the psychology test have a mean of 90 and a standard deviation of 13. scores on the economics test have a mean of 52 and a standard deviation of 10.

Which regulatory agency attempts to prevent unfair business practices and consumer fraud?

Who was the macedonian conqueror of greece and builder of an empire?