Which statement is correct?

You have been asked to implement a hub-and-spoke IPSec VPN in a multi-vendor environment where the spoke devices are not always Junos devices.

Which statement is correct?

A.
The next-hop tunnel bindings are not needed for a non-Junos spoke device.

B.
The next-hop tunnel bindings are created automatically for all spoke devices.

C.
You must manually configure the next-hop tunnel bindings for all non-Junos spoke devices.

D.
You must manually configure the next-hop tunnel bindings for all spoke devices.