Please answer the following questions: (Do not attempt to solve of you cannot answer all!!!)

The development of the Airplane threatened to take market share from which other transportation sector the most? Select one O A. Canals O B. Automobiles O C. Trains O D. Ships Alphabet Soup was the creation of the administration Select one: O A. Hoover O B. Coolidge O C. Roosevelt O D. Harding The first commercial radio broadcast occurred in what decade? Select one O A. 1910s O B. 1920s O C. 1930s O D. 1940s