What is the limitation of employing Sticky Decision Function?

What is the limitation of employing Sticky Decision Function?
A . With SDF enabled, the involved VPN Gateways only supports IKEv1
B. Acceleration technologies, such as SecureXL and CoreXL are disabled when activating SDF
C. With SDF enabled, only ClusterXL in legacy mode is supported
D. With SDF enabled, you can only have three Sync interfaces at most

Answer: B