Based on the provided options:
Question 1: The missing portion could relate to significant historical changes occurring in the United States during the time period referenced. Among the choices given, "Decreasing crime rates following Prohibition" appears most relevant, given that Prohibition (1920-1933) aimed to reduce crime related to alcohol consumption. However, the actual outcome was often an increase in organized crime.
Question 2: Without the political cartoon visible, it's challenging to provide an answer. However, political cartoons from 1921 may reference issues such as the aftermath of World War I, Prohibition, economic conditions, or social changes.
Question 3: "It allowed for mass production, which made cars cheaper and transportation easier for consumers." This response effectively describes the impact of innovations in production methods, particularly assembly line techniques popularized by Henry Ford in the automobile industry, leading to lower prices and increased accessibility for consumers.
If you need specific help with the political cartoon or further context for the other questions, please provide more details!