What should be done to correct this?

An engineer is troubleshooting application failures through a FTD deployment While using the FMC CLI, it has been determined that the traffic in question is not matching the desired policy.

What should be done to correct this?
A . Use the system support firewall-engine-dump-user-identity-data command to change the policy and allow the application through the firewall
B . Use the system support application-identification-debug command to determine which rules the traffic matching and modify the rule accordingly
C . Use the system support network-options command to fine tune the policy
D . Use the system support firewall-engine-debug command to determine which rules the traffic matching and modify the rule accordingly

Answer: D