What is the purpose of the nat 0 command when used in conjunction with IPSec?

What is the purpose of the nat 0 command when used in conjunction with IPSec?

A.
It instructs the security appliance not to use Network Address Translation for any traffic deemed
interesting traffic for IPSec.

B.
It enables Network Address Translation Traversal for any traffic deemed interesting for IPSec.

C.
It instructs the security appliance to use Network Address Translation for any traffic deemed
interesting traffic for IPSec.

D.
It disables Network Address Translation control on the security appliance.