You created a custom theme for an application.

Theme subscription links a copied theme to its master:

A. Subscribing and refreshing: Subscribing the copied theme (in Shared Components > Themes) to the master ensures it inherits updates. "Refresh Theme" (via Theme Roller or Utilities) syncs changes (e.g., CSS, templates) from the master, guaranteeing consistency.

B. Refreshing templates: Only updates individual templates, not the entire theme.

C. Copying changes: Manual, error-prone, and not guaranteed.