In what way is K’s life representative of human being in a time of social upheaval?

A、Heisaninvalidleadingalifeofrecluse;
B、Hecontributeshisownbitalthoughheiscaughtinanuncontrollableforce;
C、Hegivesupalmosteverythinghehas,evenhiswilltolive;
D、Hehaslosthismothertothewar