Explanation
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/high-availability/set-up-activeactive-ha/prerequisit According to the Palo Alto Networks documentation1, an active/active high availability pair requires four links to communicate and synchronize state information: HA1, HA2, HA3, and HSCI. HA1 and HA2 are the same as in active/passive mode, where HA1 is used for control plane synchronization and HA2 is used for data plane synchronization. However, in active/active mode, there are two additional links:
HA3: This link is used for session setup synchronization between the two firewalls. It allows the firewalls to share information about new sessions that they create, so that they can forward packets for the same session if needed.
HSCI: This link is used for session owner synchronization between the two firewalls. It allows the firewalls to determine which firewall is responsible for processing packets for a given session.
Both HA3 and HSCI links can use either a dedicated interface or a subinterface. Therefore, the correct answer is C and D.
The other options are not valid links for an active/active high availability pair:
HSCI-C: This option is not a valid link name. HSCI stands for High-Speed Chassis Interconnect, which is a physical cable that connects two firewalls in a chassis-based system. It is not related to active/active high availability.
Console Backup: This option is not a valid link name. Console backup is a feature that allows accessing the console port of a firewall remotely through another firewall in an HA pair. It is not related to active/active high availability.
References: 1:
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/high-availability/set-up-activeactive-ha/configure-ac

Explanation
If the HA status is showing as down after enabling HA Heartbeat Backup on two devices, an administrator could troubleshoot the issue by checking the peer IP address in the permit list in Device > Setup > Management > Interfaces > Management Interface Settings. This is described in the Palo Alto Networks PCNSE Study Guide in Chapter 7: High Availability, under the section "Configure Heartbeat Backup for Redundancy":
"Verify that the management interface's permitted IP addresses on each peer includes the IP address of the other peer's Heartbeat Backup interface."

Explanation
In the WildFire best practices linked below, the first step is to "... make sure that you have an active Threat Prevention subscription. Together, WildFire and Threat Prevention enable comprehensive threat detection and prevention."
https://docs.paloaltonetworks.com/wildfire/10-1/wildfire-admin/wildfire-deployment-best-practices/wildfire-best

Explanation
The best option for the ISP to configure unique service routes for different tenants is to use the Setup > Services > Virtual Systems > Set Location > Service Route Configuration > Customize option on the firewall.
This option allows the ISP to customize the service routes for each virtual system that represents a tenant. A service route is the path from the interface to the service on a server, such as DNS, email, or Panorama. By customizing the service routes for each virtual system, the ISP can ensure that each tenant uses a different interface or IP address to access these services . Option A is incorrect because it is used to inherit the global service route configuration for a virtual system, not to customize it. Option B is incorrect because it is used to customize the global service route configuration for all virtual systems, not for a specific one. Option D is incorrect because it is used to use the management interface for all service routes, not to customize them1.

Explanation
If you have a Simple Certificate Enrollment Protocol (SCEP) server in your enterprise PKI, you can configure a SCEP profile to automate the generation and distribution of unique client certificates.
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/certificate-management/obtain-certificates/deploy-