<u>The option (B) is correct. The unrestricted German attacks on submarines were the final action leading to U.S participation in world war 1.
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Further Explanation:
German’s submarine campaign during World War I:
In World War I, Germany was engaged in the unrestricted submarine warfare. It is a situation where submarines attack cargo and passengers ships. In 1915, Germany started the world war by attacking RMS Lusitania. It was an ocean liner. It resulted in the death of 1,190 people, including 128 U.S citizens. The USA declared the war against Germany after this incident.
Before this incident, the USA was neutral in war. After the German's submarine campaign, they joined the allies forced (Britain, France, and Germany). These forces were against Germany.
<u>Thus, the submarine attack from Germany forced the USA to participate in world war I.
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Learn more:
1. Learn more about the death in the world war I
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2. Learn more about the countries involved in the world war I
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3. Learn more about world war II
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Answer details:
Grade: Middle School
Subject: History
Chapter: World War I
Keywords: final, action, leading, U.S participation, world war 1, addition, Mexico, Allies, unrestricted, German attacks, submarines, bombing of Hawaii, requests, support, from England, France.