What must be done to ensure Long Distance vMotion traffic is encrypted in flight?

An encrypted VM needs to be migrated from New York to London. This particular VM houses sensitive information that needs to be encrypted during transit.
What must be done to ensure Long Distance vMotion traffic is encrypted in flight?
A. Encryption must be handled at the physical network layer.
B. vSphere vMotion uses encryption when migrating encrypted virtual machines.
C. Long-Distance vSphere vMotion does not support encryption.
D. Select encryption in the transit option.