Under which presidential administration did the national debt triple, due to a combination of tax cuts and defense spending?

What was the main argument of plessy in plessy v. ferguson

Which of these statements describes a long-term impact of european imperialism in africa? a. african countries joined together to present a united front against imperialism. b. europeans paid african countries after colonizing them, offering these new countries a fresh start. c. european powers drew the current borders, splitting ethnic groups among modern countries. d. africans became more loyal to their countries than to their ethnic groups.

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?