Final answer:
The political changes that occurred within the United States as a result of declaring war on Germany in World War I included an expansion of civil liberties, the growth of the military-industrial complex, and the adoption of a peacetime economy. The correct options are A, C, and D.
Step-by-step explanation:
When the United States declared war on Germany in World War I, several political changes occurred within the country.
- Expansion of civil liberties: The war sparked a wave of patriotism and support for the troops, leading to a loosening of restrictions on free speech and assembly. This allowed Americans to express their views and engage in public debate more freely.
- Growth of military-industrial complex: The war effort required the mobilization of the American industry, which led to the growth of the military-industrial complex. This complex involved the close collaboration between the military and the private sector, resulting in increased production of weapons and supplies for the war.
- Adoption of a peacetime economy: After the war, there was a shift in the American economy from wartime production to peacetime activities. The government encouraged economic growth and recovery by implementing policies that promoted industrialization and consumer spending.