Which of the following statements is TRUE?

Jacob is using a mesh VPN Community to create a site-to-site VPN. The VPN properties in this mesh Community display in this graphic.

Which of the following statements is TRUE?

A.
If Jacob changes the setting, “Perform key exchange encryption with” from “3DES” to “DES”, he will enhance the VPN Community’s security and reduce encryption overhead.

B.
Jacob must change the data-integrity settings for this VPN Community. MD5 is incompatible with AES.

C.
If Jacob changes the setting “Perform IPSec data encryption with” from “AES-128” to “3DES”, he will increase the encryption overhead.

D.
Jacob’s VPN Community will perform IKE Phase 1 key-exchange encryption, using the longest key VPN-1 NGX supports.