To effectively reach large numbers of people, the best option among the ones listed would be:
- Mass media
Mass media encompasses various formats, including television, radio, newspapers, and online platforms, making it highly effective for disseminating information to a broad audience. While outdoor media (such as billboards), print media (such as magazines and newspapers), and broadcast media (which primarily refers to television and radio) can also reach large audiences, mass media as a term includes all of these and highlights its capability for wide distribution.