Answer: A. drought
Explanation:
It is A because their environment changed alot so it was difficult to grow corn and so the migrated south where it rained more.
League of Nations aimed to prevent war by using collective security and demilitarization. t<span>he U.S. Senate did not ratify the Treaty of Versailles, which especially lots meant that united states of america of america in no way joined the League of international locations. Plus, the Senate rejected President Wilson's alliances with super Britain and France. All in all, Wilson could not do something without the Senate's consent. i'm uncertain if Wilson and the Senate had the comparable view on the Treaty of Versailles, yet i understand that the U.S. had to compromise with super Britain and France because of the fact those 2 international locations had to rid Germany of each and every thing as revenge.</span>
It was seen as interfering with the US power and it would allow countries to see internal affairs in the USA.
hope this helps x
