Which IKEv2 feature minimizes the configuration of a FlexVPN on Cisco IOS devices?

Which IKEv2 feature minimizes the configuration of a FlexVPN on Cisco IOS devices?

A.
IKEv2 Suite-B

B.
IKEv2 proposals

C.
IKEv2 profiles

D.
IKEv2 Smart Defaults

Explanation: