How can Bella change her workspace’s messaging restrictions to minimize disruption?

Bella is a Workspace Admin at a company with 3,500 employees. She is receiving complaints from her colleagues that "Slack is too noisy". Her team is bothered by frequent use of @here and @channel in public channels. She has never evaluated or changed the default settings, so she wants to change how those notifications work in her workspace.

How can Bella change her workspace’s messaging restrictions to minimize disruption?
A . DM each user who uses the @here and @channel mentions and ask them not to do this in large channels.
B . Set @here and @channel to be used only in private channels, where membership is more limited.
C . Restrict @here and @channel usage to Owners and Admins only.
D . Restrict public channel posting to just Owners and Admins.

Answer: D