How can the firewall be configured automatically disable the PBF rule if the next hop goes down?

A user’s traffic traversing a Palo Alto Networks NGFW sometimes can reach http://www.company.com. At other times the session times out. The NGFW has been configured with a PBF rule that the user’s traffic matches when it goes to http://www.company.com.

How can the firewall be configured automatically disable the PBF rule if the next hop goes down?
A . Create and add a Monitor Profile with an action of Wait Recover in the PBF rule in question.
B . Create and add a Monitor Profile with an action of Fail Over in the PBF rule in question.
C . Enable and configure a Link Monitoring Profile for the external interface of the firewall.
D . Configure path monitoring for the next hop gateway on the default route in the virtual router.

Answer: B