Which statement about using attachments is true for communication templates?

A.
An option is to send a document folder as the attachment with the communication.

B.
When the communication template is created with attachments, the attachments are
compressed for storage in the database as a blob.

C.
Communication templates can use substitution variables for the type of document to be sent so
that an appropriate attachment is always selected.

D.
When multiple documents are attached to a communication template, they are compressed for
sending by the workflow at the time of submission.

Explanation: