Answer:
D. Mailing list
Explanation:
A Template is a kind of a file that is used as a starting point for any new document. And that template is always in some way or the other pre-formatted. As an example, we use the mailing list in the MS word which is used to send the mail to many through the mail merge. A template can either be available with the program or it can be developed by the user, like a mailing list. Hence, here the mailing list is the right option as it serves as the starting point for a new document like in case of mail merge.
