What does the following dialogue (Paragraphs 27-28) mainly reveal about Steve?

“CHARLIE. Go ahead, Steve. What kind of ‘radio set’ you workin’ on? I never seen it. Neither has anyone else. Who you talk to on that radio set? And who talks to you?

STEVE. I’m surprised at you, Charlie. How come you’re so dense all of a sudden? [A pause.] Who do I talk to? I talk to monsters from outer space. I talk to three-headed green men who fly over here in what look like meteors.”
Answer choices for the above question

A. Steve is admitting to Charlie that he is from outer space.

B. Steve is showing that he finds Charlie’s questions ridiculous.

C. Steve is explaining how his radio set works so Charlie will understand.

D. Steve is stalling while he figures out how to answer Charlie’s questions.