Which of the following could be a push factor?

a. country-wide famine
b. good harvest
c. increase in average income
d. single ethnic group

Hello there!

From my views, this answer would be A. Country - Wide Famine.

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Brazzaville and kinshasha, luanda,librevilleand and monrovia.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years