Two characteristics of modernism in literature are absurdity and symbolism. Knowing this, the most absurd of these options is D because the family tries to start a new life, but they are unable to if all of the problems they had, came right back. B would also be a ridiculous option, because having a tornado strike after you come looking to leave your problems behind is simply absurd. For symbolism, both work well too, so sorry for not being sure. In D, the symbol of the problems returning would be that no matter how hard these people try to leave their past behind, there will always be a form of it chasing right behind them. And for the tornado, in my opinion, it would signify that this is simply not the place to start a new life. Because of this, I believe it is D, but it may also be B, so I am sorry for not being able to give you a clear answer. I hope this helps you!
The definition of modernism is "a style of movement in the arts that aims to break with classical and traditional forms." Characteristics of modernism usually include self-consciousness and irony.
If all of their problems come back, that would be considered as irony [I'm pretty sure]
