When performing an e-mail restore using Simple Mail Transfer Protocol (SMTP), why is there a
prompt to provide a sender e-mail address?

A.
The restore will fail if the address is not included.

B.
A reference point for the source is always required in order to send the e-mail.

C.
The e-mail address for the sender is identified as the source address for any restored e-mail
messages.

D.
Some SMTP servers require a valid sender e-mail address to authenticate the user and accept
the e-mail.