How did the producers of the radio version of the war of the worlds warn the audience that the broadcast wasn't real? a. by telling the audience that everything would be o. k. b. by saying that the narrator was reading from a book c. by adding a disclaimer at the beginning of the show d. by sending letters to each househ

Because the topic of alien invasion was a hot topic around the time _War of the Worlds_ came out, it was very possible and very plausible that those listening to the radio program would, in fact, believe what they were listening to were real-life events and not a science-fiction piece.  As such, at the beginning of the radio program, there was a disclaimer that preceded the show that informed listeners that what they were about to hear was not real.  However, those who happened to tune in late and happened to miss the disclaimer, and many believed that what they were listening to was actually happening.

It might be By announcing before, during, and after the broadcast that the program was fictional for others.

Explanation:

the answer to "what does the narrator realize by the end of the story" is b.