Which method of communication is efficient for reaching a large audience across multiple locations?

Email is the most efficient method of communication for reaching a large audience across multiple locations. It allows for quick distribution of information to numerous recipients simultaneously, regardless of their geographical locations. Unlike a telephone call, which is typically a one-on-one conversation, or face-to-face meetings that require coordination of schedules and travel, email can be sent and received instantaneously.

Furthermore, unlike letters, which can take time to deliver and may not be read immediately, emails can be accessed instantly by all intended recipients. This immediacy and broad reach make email particularly valuable for organizations needing to disseminate information quickly and effectively to a diverse audience. Additionally, email allows for the inclusion of attachments, links, and additional resources that can enhance the communication further.