What was one of the main reasons that large numbers of irish moved to the united states in the 1840s

Which is one reason many african nations have not prospered after gaining independence from european colonial powers? a. colonial powers sent their weakest economic advisors to the new countries, and their recommendations were flawed. b. independence left them with weak economies, and many countries have been unable to overcome or recover from these burdens. c. the desert region of the interior is inhospitable to foreign investors, and business interests focused on the coastal mediterranean cities. d. the money endowed upon independence is still tied up in the bank of england, which is hesitant to make loans to struggling nations.

Capitalism competed with dominance in the twentieth century communism merchantilism free enterprise feudalism

Why do many scientists suppose the land bridge theory of migration?