The images shown in the question are from world war II. During world war II American factories were engaged in manufacturing and supplying aircrafts for the war. America also supplied resources to the soldiers during the war.
American productivity during world war II
In the given question
- Option 2. American factories produced aircraft for the war effort.
- Option 4. American troops at the front relied on trucks to keep them supplied.
America has supplied aircraft as well as other resources during the war, that helped the people to lead the war.
Therefore option 2 and option 4 are correct.
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