Which of the following recipes will append emails from “root” to the “rootmails” mailbox?

Which of the following recipes will append emails from "root" to the "rootmails" mailbox?

A.
:0c:
rootmails
* ^From.*root

B.
:0c:
* ^From.*root
rootmails

C.
:0c:
* ^From=root
rootmails

D.
:0c:
* ^From=*root
rootmails

E.
:0c:
$From=$root
rootmails