Why is the Louisiana Purchase an example of foreign and domestic policy?

Push-and-pull factors contribute to

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.

What important race leader of the early twentieth century is being described?