This story is not true because the elapsed time between 9:00 pm and 4:00 am is five hours. The author also says the words "must've" which do not indicate an exact answer. I hope this helps!
Answer:
The correct answer is "It is an adverb phrase modifying asked.
Explanation:
Forests and grasslands are maintained with fire. Sometimes they can go terribly wrong and result in bad wildfires. Hope this helps!