Native Americans had almost no resistance to European diseases, like smallpox, so: A: Europeans brought slaves over from Africa.

B: scientists developed a smallpox vaccination.

C: European colonies were unable to grow labor-intensive cash crops.

D: All of the choices are correct.

How did emperor justinian’s review of roman laws create a more efficient legal system? a. he got rid of outdated and repetitive laws. b.he ranked the laws according to importance. c.he created new laws to address modern situations. d.he combined minor laws into stricter categories. ill mark brainliest

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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.