In your opinion, was the Columbian Exchange good or bad for humanity?
Defend your answer with examples.

For the Native Americans, one possible good thing about the Columbian Exchange was the fact that they were introduced to horses. This was a very good thing for many of the Plains Indians of North America. Their lives became easier once they had been introduced to horses and had learned to use them.

Explanation:

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

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he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: