D. explaining that the sinking land is not just a problem for residents on the Isle de Jean Charles
Explanation:
The "Stomping Out the Boot" section has the ability to present shipwreck as a major problem for island residents. This is because shipwreck, in itself, is not the only problem they will have to face, but a series of secondary problems will arise from that and they will cause great difficulties for residents, which means that the shipwreck problem is extensive and has several layers.
It changes because in the beginning he is oblivious to anything he's done wrong. He doesn't feel like he's contributed to Eva smiths death. As the play goes on he learns that in fact he might have had an impact on her death and he takes more responsibility for it so the level of guiltiness gradually gets higher as he hears more about her death. At the end he feels extremely guilty and decides to change instead of ignoring what's happened like Mr and Mrs Birling