Answer:
The correct option is: D. deliver audio/video files via RSS
Step-by-step explanation:
A podcast refers to a series of episodes in a digital audio or video format which can be downloaded by the users. Podcast can also be described as a method of sharing data or information generally in a digital audio or video format.
The series or episodes can be delivered through RSS, blog or a website. RSS is a web feed or a channel which can be used by the users to keep track of the various website updates in a computer-readable standard format.