Which statement describes the UTM licensing model?（）

• A、Install the license key and all UTM features will be enabled for the life of the product
• B、Install one license key per feature and the license key will be enabled for the life of the product.
• C、Install one UTM license key, which will activate all UTM features; the license will need to be renewed when it expires.
• D、Install one UTM license key per UTM feature; the licenses will need to be renewed when they expire.