Why did European nations conquer Africa and ruled over India during the age of the new imperialism?

The European countries were able to colonise African countries rapidly because there were rivalries between African leaders. ... This led to even more deaths of animals and people, and due to their physical and mental weakness, they were unable to fight against European powers.

Explanation:

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the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.