You're a Workspace Owner introducing Slack to your organization for the first time.

Slack’s analytics dashboard provides detailed activity metrics per user:

"The Members tab in the analytics dashboard shows the number of messages sent by each member, making it easy to track individual engagement."

The Channels tab tracks activity per channel, not per user.

Installing a bot (option B) or exporting messages (option D) would be unnecessary and complex when Slack’s native analytics already provide this data.

(Reference: Slack Administration Study Guide - Analytics and Reporting)

===========

—