There is no set length for podcasts; some last only 5 minutes, whereas others might be an hour long. The length depends on the subject matter and the podcaster. The Option B is correct.
A podcast refers to a program made available in digital format for download over the Internet. For instance, the episodic series of digital audio or video files that a user can download to a personal device to listen to at a time of their choosing.
A streaming applications and podcasting services provide a convenient way to manage a personal consumption queue across many podcast sources and playback devices.
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