Which of these events occurred first? the fall of the songhai empire the fall of the mali empire the introduction of islam into west africa the entrance of portuguese explorers into african territory

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period? if there should be a waiting period, explain why.

What was herbert hoover and the food administration do in wwi?

When there are advances in technology, such as the personal computer, how might business productivity change? a) productivity is separate from technological advances so there is no impact. the new technology can replace outdated, less efficient, machinery. o) the businesses' products will no longer be demanded. d) manufactured items will be made elsewhere.