The fourth alternative is correct (D).
The American economy reached an extraordinary expansion during the First War, impelling its industry immensely as the US became responsible for the supply of raw materials, industrialized products and armaments to Europe.
There was then a moment of economic euphoria in the country and the predominance of the "American way of life". However, the euphoria led to overproduction and there was enough demand, causing recession. This was the initial scene of the Great Depression of the 1930s.
