Accepted Answer
The closing of manufacturing plants in midwestern cities like Pittsburgh, PA, and Youngstown, OH is an example of "Rust Belt" (Option B)What is the meaning of "Rust Belt"?The Rust Belt refers to the former manufacturing-dominated area stretching from New York to the Midwest. The Rust Belt is associated with places experiencing industrial decline and abandoned facilities that have rusted due to exposure to the elements.The phrase "Rust Belt" refers to an area of the United States that underwent industrial decline beginning in the 1950s.Heavy industry has fallen in the region, long regarded as America's industrial heartland, since the mid-twentieth century. Manufacturing job transfers overseas, greater automation, and the demise of the US steel and coal sectors are among the causes.Learn more about "Rust Belt":https://brainly.com/question/2815831#SPJ1