A is the correct answer because the European countries were looking for more resources that they didn't have in their home countries.
Its not whether he had the right to or not, if youll look through history. Rarelly was there ever a country that gained power and status by sitting idly wondering about the ethics behind every little move they made. The doctrine was not really so much a line in the sand as it was a standard being set. The meaning behind it ? we will defend sovereign democracies in the western hemispheres because weve suffered under your rule for long enough to know that nobody but the monarchs fare well. At the time the french were reviving the spanish crown as a favor in return for cuba. As well as russia and some others forming the Holy alliance to defend monarchism. So that, to the U.S. seemed threatening enough.
A
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A warming climate meant that more edible plants were available: it means that people could rely better on gathering food.
It also meant that fishing was easier for many reasons. - the correct answer is c
It made the food generally more abundant, so it did not lead to extended wars. Also there was still plenty of land left, so the Indians didn't loose a significant amount of land.
It is important so they have somebody they can trust and rely on.