Which of the following best explains the reason for the rise in the standard of living in the United States after World War II?

(1 point)
Responses

the investment in fighting communism worldwide
the investment in fighting communism worldwide

greater productivity at lower costs
greater productivity at lower costs

the creation of Levittown
the creation of Levittown

the passage of the Equal Rights Amendment
the passage of the Equal Rights Amendment
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greater productivity at lower costs