What sparked U.S. entry into World War I and what were key domestic changes during the war?

What sparked U.S. entry into World War I and what were key domestic changes during the war?

• A. The United States entered due to alliance commitments in Europe
• B. Unrestricted submarine warfare and the Zimmermann Telegram; domestic changes included selective service, war industries, and propaganda campaigns.
• C. The war began because of economic interests in Europe; domestic changes were minimal
• D. The war ended with immediate withdrawal from global affairs

Answer: (B)

The key idea tested is how foreign shock and a coordinated home-front response together pulled the United States into World War I. German policy of unrestricted submarine warfare threatened American lives and ships, turning war into a direct danger to the United States and its interests. The Zimmermann Telegram added a political shock by suggesting a Mexican alliance against the U.S., which further shifted public opinion toward war. These foreign events made neutrality untenable. At the same time, the United States mobilized domestically to support a large-scale war effort: the Selective Service Act established the draft to raise a mass army, the War Industries Board organized production and resources for military needs, and the Committee on Public Information ran propaganda campaigns to build support on the home front. Together, these actions show how wartime goals were pursued through both foreign-policy choices and a robust domestic program. Other options don’t fit because alliance commitments and broad economic interests didn’t by themselves spark entry, and a claim of minimal domestic changes ignores the transformative steps taken to mobilize the country for war.

The key idea tested is how foreign shock and a coordinated home-front response together pulled the United States into World War I. German policy of unrestricted submarine warfare threatened American lives and ships, turning war into a direct danger to the United States and its interests. The Zimmermann Telegram added a political shock by suggesting a Mexican alliance against the U.S., which further shifted public opinion toward war. These foreign events made neutrality untenable.

At the same time, the United States mobilized domestically to support a large-scale war effort: the Selective Service Act established the draft to raise a mass army, the War Industries Board organized production and resources for military needs, and the Committee on Public Information ran propaganda campaigns to build support on the home front. Together, these actions show how wartime goals were pursued through both foreign-policy choices and a robust domestic program.

Other options don’t fit because alliance commitments and broad economic interests didn’t by themselves spark entry, and a claim of minimal domestic changes ignores the transformative steps taken to mobilize the country for war.