So there would be someone to blame for her mother's leaving
The correct answer is C.
A dystopia is a "futuristic, imagined universe in which oppressive societal control and the illusion of a perfect society are maintained through corporate, technological, moral, or totalitarian control". It is the opposity of an utopia.
A world that has plunged into chaos because of the government removing the right to electricity from rebel communities is an example of a scenario for a dystopian story, since it shows how the oppresion of the government leads to a disastrous change on society's functioning. And it also shows how this scenario is maintained by the government's totalitarian control.
The rest of the answers, in which people disappear, aliens replace teenagers and a genius boy is discovered living in a library cellar, would make for good sci-fi scenarios rahter than dystopian societies.
Homeowners who feel (powerless) might show (boldness in attempt to intimidate) at an approaching wildfire because the house belongs to them, and they want to do whatever it takes to stop the fire from destroying it.
A person who shows no emotions or is unable to feel them. Someone who shows no empathy for others or doesn't feels sorry for anyone.