Option C preserves the protection supplied by Zscaler’s category hierarchy while adding a more specific business exception. Zscaler supports custom URL entries that retain parent-category membership, so a site can remain subject to its security classification instead of losing that context when added to a custom category. The administrator can then reference the custom category in a deliberately scoped, higher-priority URL Filtering rule, applying Allow to validated low-risk destinations or Isolate to uncertain content. Broader security-category rules continue to block destinations that require stronger enforcement. Replacing parent membership risks removing security classification, while a global allow is overly permissive. Bandwidth shaping controls capacity, not destination risk. Bypassing URL Filtering through Cloud App Control would also undermine the stated requirement to maintain protection.