Submarines are highly efficient War machine. It is easy to attack the enemies and can hide easily.
<u>Explanation:</u>
20 to 30 sailors on submarines can cause more damage than 1000 soldiers on the battlefield. Usually, Submarines operate during the night. Germans mostly used advanced submarines which led them to attack US submarines effectively.
They called submarines as U-boats means underwater boats. submarines usually travel on the surface of the water and can go downwards to a limited extent. Submarines use a diesel engine for high surface speed and for long travel.
There is no excerpt given but the central idea here is that there is a great injustice being done to African Americans. They endured much and suffered under the yoke of slavery. They will fight to abolish this evil that is destroying both African American as well as White Americans.
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D. <span>Its people have rebelled against communism.</span>
The answer is A, suffrage.