How could the Palo Alto Networks NOFW administrator reduce WAN traffic while maintaining support for all the existing monitoring/security platforms?

An organization has Palo Alto Networks MGfWs that sendlogs to remote monitoring and security management platforms. The network team has report has excessive traffic on the corporate WAN.

How could the Palo Alto Networks NOFW administrator reduce WAN traffic while maintaining support for all the existing monitoring/security platforms?
A . forward logs from firewalls only to Panorama, and have Panorama forward log* lo other external service.
B. Any configuration on an M-500 would address the insufficient bandwidth concerns.
C. Configure logcompression and optimization features on all remote firewalls.
D. Forward logs from external sources to Panorama for correlation, arid from Panorama send to the NGFW

Answer: A