You're the Primary Owner of your company’s Slack Business+ workspace.

According to Slack role definitions:

"Workspace Admins can manage members, channels, and settings for the workspace without the broader privileges of Workspace Owners or Org Admins."

Org Admin (A) is too high-level for this task on Business+ (Org Admin is primarily an Enterprise Grid role). Workspace Owner (C) has more extensive authority, including transferring workspace ownership. Member (D) cannot manage users or channels.

(Reference: Slack Administration Study Guide - Roles and Permissions)

===========

—