It would be the US. The US economy sky rocketed after WW2.
The correct answer is B) Silent Spring .
Silent Spring was a book written by Rachel Carson regarding the dangers of chemicals (specifically pesticides). This includes the detrimental effects these chemicals have on the environment and the negative health effects they can have on humans. For example, DDT was a substance discussed often by Carson. DDT was found to have links to the development of cancer.
Carson argued that chemical companies tried to hide/misinform the public about chemicals and what damage they can cause.
The 14th Amendment overturned the Dred Scott decision. This amendment gave citizenship to more than 4 million previously enslaved African Americans. The 14th Amendment was part of the Reconstruction Amendments, which included the 13th (abolished slavery) and the 15th (gave African American men the right to vote). These amendments were passed between 1865-1870.
Answer: C. the downing of an American U-2 spy plane over the Soviet Union.
The downing of the American spy plane in Soviet Union named U-2 contributed mostly to the cancellation of a scheduled summit between the Soviet Union's leader Nikita Khrushchev and that of President Dwight D. Eisenhower.