Final answer:
The Radio and Telephone are the two technologies from the given options that most influenced Americans in the 1920's. Radios transformed news consumption and entertainment, uniting regions. Telephones revolutionized communication, promoting greater interconnectedness.
Step-by-step explanation:
The 1920's, also known as the Roaring Twenties, saw myriad technological advancements that greatly influenced American society. The two most prominent technological inventions from the given options that highly impacted Americans in the 1920's are Radio and Telephone.
Radio was a key technology of the 1920's, effectively transforming the way people received news and entertainment. It not only provided an avenue for information dissemination but also united people across vast distances, transcending regional boundaries.
The Telephone revolutionized personal and business communication, making it possible for individuals to connect in real-time without having to be in close physical proximity. It influenced social and economic aspects of life, promoting greater interconnectedness.
The Telegraph was already in use before the 1920s, and the Television was not introduced until the end of the 1920's and became more prevalent in the 1930's and 1940's. Hence, these options had less influence in the 1920's compared to radio and telephone.
Learn more about American's life in the 1920's