C) the puritans voyage back to england
Answer: Scrooge accuses the first ghost of being indigestion
Explanation: The speech is ironic because Scrooge accuses the ghost of being indigestion rather than admitting he is afraid of him. The ghost asks Scrooge why he doesn't believe in him.
I think the correct answer is the third one, "I made the best brownies today!"
An unreliable narrator is a narrator whose credibility has been compromised. Since you can't tell if this narrator credibility has been compromised from a single sentence but need a whole text to develop such incredibility, I say this is unreliable because the narrator is giving its own opinion of something he/she has made, and you can't rely on he/she being imparcial.