Final answer:
The command get system fortiguard web-filter-force-off: disable is used to disable forced FortiGuard web filtering on FortiGate firewalls.
Step-by-step explanation:
The command get system fortiguard web-filter-force-off: disable in the context of a FortiGate firewall is used for the administration of web filtering capabilities. The correct answer to the function of this command is a) Disables forced FortiGuard web filtering. When this setting is disabled, it allows the FortiGate firewall to stop enforcing the web filtering provided by FortiGuard services, which might be used for various administrative or troubleshooting purposes. It's important to handle such configurations with care to maintain network security and comply with organizational policies.