What is the cause of this behavior?

A NetWorker server has a media library attached. A backup administrator has started a workflow and noticed that the Waiting for 1 writable volume(s) to pool alert appeared. There are some unlabeled media in the library, but NetWorker doesn’t label them automatically.

What is the cause of this behavior?
A . A Recycle from other pools attribute on the pool properties is disabled.
B. A Recycle to other pools attribute on the pool properties is disabled.
C. An Auto media management attribute in tape properties is disabled.
D. An Auto media management attribute in library properties is disabled.

Answer: C