Faber believes that Montag died when the listening device stopped transmitting.
Explanation:
Its simple, the news reported that they were looking for Montag and sent hounds/helicopters (it is not d). Faber is very aware of the punishment for owning books, he would no the surprised when Montag has been there before (it is not b). I have taken a test before with this question (it is not a). That leaves us with c.
