Read the following context and choose the best option to answer the question.
Context: The 150 pound people that jumped from the towers as the flames blistered their bodies , made bigger craters than this six ton engine when their chests and brains exploded on the concrete below .
Question: What may be the reason they jumped ?
Options: 
A. The window collapsed .
B. The building collapsed .
C. The engine collapsed .
D. The plane collapsed .


B