The option that best completes the diagram is: D. Widespread unemployment
During the Great Depression, one of the significant impacts was widespread unemployment. Millions of people lost their jobs as businesses collapsed, leading to a severe economic crisis. The New Deal, introduced by President Franklin D. Roosevelt, aimed to address this issue and stimulate economic recovery through various programs and reforms.
The Securities and Exchange Commission (SEC) was created as part of the New Deal to regulate the securities industry and protect investors. While concerns about unregulated business and low crop prices were also factors during the Great Depression, widespread unemployment was the most prominent and impactful aspect represented in the diagram.
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