Answer:
The two young boys were asleep when the rocket went off.
Step-by-step explanation:
In the second image, the two boys are asleep, and in the text, it says "he Rocket proclaimed his majestic flight would be talked about for ages, but nothing of incidence occurred because nobody saw or heard the Rocket burst. Even the boys who found him had fallen asleep."
This is 100% correct. (just took the test)