Channel richness refers to the capacity of a communication medium to provide immediate feedback, multiple cues such as tone and gestures, and personal focus. Face to face discussion allows teachers and students to see facial expressions, hear vocal nuances and respond instantly to each other, so it is considered the richest channel for complex or sensitive topics.
Option A:
Option A (email) allows thoughtful, documented messages, but feedback is delayed and nonverbal cues are limited to writing style and emoticons, so the channel is less rich.
Option B:
Option B (printed handouts) is a one-way written channel that provides information but no built-in mechanism for immediate feedback or observation of nonverbal responses.
Option C:
Option C is correct because face to face classroom discussion offers immediate feedback and combines verbal and nonverbal cues, making it the richest channel among the options.
Option D:
Option D (notice on website) is also one-way, impersonal communication; students typically cannot respond in real time, so the channel has low richness.
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