What Does Crummett's Discussion of Bob and the Bugatti Help

What does Crummett's discussion of Bob and the Bugatti help to show?

A) Pro tanto moral duties are the most important in the ethical life
B) We cannot expect Bob to sacrifice his Bugatti
C) Bob would not have been put in this situation if he had chosen a career well
D) The obligation to save a life must be very strong
E) The responsibilities that one has towards others are rarely demanding