E-mail messages, instant messages (IMs), or text messages sent and/or received within an organization a. are not included on a records retention schedule. b. may be considered as records or nonrecords. c. original messages are retained in the e-mail system indefinitely. d. do not reduce mailing costs.

b. may be considered as records or non records

Explanation:

Message in an organization and even instant messages (IMs) can be considered as records or nonrecords, this depends on the content, nowadays in a company can be used apps like social media, important information can be stored between customers or partners, this no reduces any cost and the message can be deleted depends on the server settings.