Refer to the exhibit.

Based on the provided exhibit showing an active-passive FortiGate High Availability (HA) pair with external and internal Azure load balancers and without the use of an SDN connector, the administrator should implement a Probe IP address with two static routes (Option B).

Probe IP Address: Azure load balancers use a health probe to determine the health of the instances in the backend pool. The health probe ensures that the load balancer only directs traffic to the active (primary) FortiGate in an HA pair.

Two Static Routes: Given that this is an active-passive setup, static routing should be used to ensure deterministic traffic flow. Two static routes would be configured to ensure that traffic can flow to the active unit and be correctly routed to the protected subnets in failover scenarios.

References: The recommendation for using a Probe IP address with static routes is based on Azure's best practices for load balancer configuration, particularly for HA scenarios, as well as on Fortinet's HA documentation for cloud deployments. This setup ensures high availability while allowing proper traffic distribution based on the health probe's findings.