At present you run Traditional mode VPN configuration on all Gateways and policies. Your boss now decides to migrate or convert to simplified mode VPN due to its advantages. You want to implement this without any downtime. What is the easiest way to achieve this?

A.
You will convert Gateway policies by using the simplified VPN wizard, and thenmigrate Gateway per Gateway

B.
You will manually re-create Gateway for Gateway using Simple Mode wizard, then completely re-write the policies then install this on simplified VPN

C.
There is now way to migrate without downtime

D.
You will manually re-create Gateway for Gateway using SmartMap, then completely rewrite the policies then install this on simplified VPN

E.
You will manually migrate each Gateway,then completely re-write the policies then install this on simplified VPN