Mrs. Radley dies
Scout believes that the world is ending because it is snowing and she has never seen snow before.
Jem and scout ran out of snow so they used mud as well.
If I personally had to choose between these I would choose A because this is a metaphor that is widely used, making it a cliché.
"Then the rebels will overcome the empire's troops and take the city."
This is the answer because it is still hypothetical. The other options imply that it has already happened or is happening, however it is just the fear of the leaders.
(Also, for curiosity's sake- what is the context? It sounds like Star Wars.)
