Anastasia is an Org Owner on the Enterprise plan.

When engagement in public channels drops, Slack recommends education and re-engagement campaigns like hosting a “Slack day” to showcase best practices.

Slack documentation highlights:

"Slack Days are opportunities to encourage better usage patterns, provide learning sessions, and reinforce the importance of open communication through public channels."

Option A and D focus on short-term fixes and notifications, not improving behavior sustainably. Option B alone is not a complete strategy.

(Reference: Slack Administration Study Guide - Driving Adoption and Maintaining Engagement)