In situations where an illegally obtained recording falls into a journalist’s hands (as in Bartnicki v. Vopper), what is true?

a. The journalist may not legally broadcast the recording under any circumstances.
b. The journalist may legally broadcast the recording as long as its origin is determined first.
c. Particularly when it involves a matter of public concern, the unknown origin does not remove the First Amendment right to broadcast the recording.
d. The authenticity of the recording must be determined before the recording can be broadcast.

c. Particularly when it involves a matter of public concern, the unknown origin does not remove the First Amendment right to broadcast the recording.