Installing an organization-ready Slack application at the Enterprise organization level does not automatically add the application to every workspace in that organization. Slack explicitly separates organization-level installation from workspace access. After installation at the organization level, an Org Admin must grant the application access to one or more individual workspaces---or all workspaces---before members in those workspaces can actually use it. This architecture allows centralized authorization and token management while retaining administrative control over where the application is available. Option B is therefore incorrect because organization-level installation alone does not make the application immediately operational in every workspace. Option C incorrectly describes the requirement as installation ''to a channel.'' Applications are granted to workspaces; channel membership may subsequently matter for specific APIs or event subscriptions, but that is a separate issue. Application collaborators manage application configuration and development access and are not required merely to activate an organization-installed application. Slack identifies simplified token storage and centralized policy as major advantages of organization-ready installation while retaining workspace-level access control. This aligns directly with Design for Scale, especially Enterprise organization deployment and organization-ready applications.