Final answer:
The answer to the question is 'none of the above' as memos, policy statements, and discussions are all mediums of transmission for information and policies.
Step-by-step explanation:
The correct answer to the question "Which of the following is not a medium of transmission?" is d. none of the above. All of the options listed can serve as mediums through which information, policies, and ideas are communicated.
Memos, policy statements, and discussions are all channels of communication that can be used to convey messages within an organization or between entities. A memo is a written document typically used for internal communication in an organization. A policy statement lays out an official stance or approach of an entity on a particular issue and can shape behavior or decisions. Discussions involve the interactive exchange of ideas and serve as a means for information to flow...
The broader context of this question falls under the study of communication within the field of social studies, learning about how different mediums impact the transmission of information.