When the europeans established colonies in oceania is the 1800s, they inadvertently caused the native people to suffer from
a) disease.
b) famine.
c) poverty.
d) warfare.

The correct answer to the question above is (d.) warfare. When the Europeans had established colonies in the Oceania in the 1800s, they had inadvertently caused the native people to people to suffer from a warfare. 

Answer were lower;

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