Provide an example of an invention and explain how it either increased trade or contributed to economic growth and prosperity. please answer the question

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.

What did roosevelt believe was a common cause of both bank runs and the great depression?

What was the “u-2 incident” and how did it affect u.s./soviet relations in 1960?