Answer:
a.The guns made it easier for troops to gain ground rapidly and fearlessly by crossing trenches.
Explanation:
The machine gun revolutionized combat endeavors and rapidly drove out countries with their horse-drawn carriages into submission. From its uncovered roots beginnings to the advancement of this notable weapon that is still being used today, it figured out how to practically without any assistance change the result of WWI and along these lines change the craft of war.
Warren Harding, Calvin Coolidge, and Herbert Hoover were all president at some point in the 1920's in that order.
Mexico is a country of South America.
South America is a continent
Northern Africa is located in Africa.
Northern Africa is both a country and is part of a continent
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D.territorial expansion
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