It’s a triangle in an ocean that many boats and people have gone missing and no one have found them
<span>C.) The first women's rights convention is held in 1848
</span><span>D.) In 1833 the American Anti-Slavery Society is founded</span>
I'm not going to write 50 words, but historical context is always important so you can use examples.
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.