An administrator wants users to have the ability to install extensions of their choosing However,...

To allow users to install extensions while blocking those with specific risky permissions, the administrator should "Allow all apps" from the Chrome Web Store and then use the "Block extensions by permission" policy to block extensions that request the "File System" permission. This prevents extensions from accessing local files. Option A is too restrictive by blocking all apps by default. Options B and D use "Runtime Blocked Hosts," which is for controlling access to specific websites, not for blocking extension permissions.

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