Final answer:
The invention of the television did not affect everyday life in the 1920s, unlike the explosion in automobile ownership, radio popularity, and mass advertising.
Step-by-step explanation:
The development that did NOT dramatically affect everyday life for many Americans during the 1920s was d. the invention of the television. While the 1920s was a transformative decade for American culture and lifestyle changes, including a boom in automobile ownership, the widespread popularity of the radio, and an increase in mass advertising and public relations, the television was not yet a part of everyday life in that era. Automobiles became more accessible due to the mass production techniques employed by manufacturers like Henry Ford, the radio became a central source of entertainment and national news, and mass advertising spurred consumerism and shaped a new American mass identity.