It could either be choice 3 or 4.
There is a topic: "Reasons why people should buy hybrid autos."
Misspelled words? Nope. Use spellcheck if not sure.
No errors. None to me (I don't know about structure errors)
Only two details... looks fishy...
Choose from the two.
Answer:
Do I understand the point the author is trying to make?
OR
Do I comprehend the author's information about the subject of their text?
I would say that the answer is probably 3. Hope this helped!
-TTL
