Supply the Missing Premise to Make a Properly Structured Argument

Supply the missing premise to make a properly structured Argument from Analogy:
1) It is morally permissible for a taxi driver to protect themselves by refusing to transport a violent passenger.
2) ) ..
Thus, it is morally permissible for a nurse to protect themselves by refusing to care for a patient with a highly contagious deadly disease (such as Ebola) .

A) Self-defense is morally permissible.
B) A nurse protecting themselves by refusing to care for a patient with a highly contagious deadly disease (such as Ebola) is relevantly similar to a taxi driving protecting themselves by refusing to transport a violent passenger.
C) A nurse protecting themselves by refusing to care for a patient with a highly contagious deadly disease (such as Ebola) is the sort of thing any rational person would probably do.
D) Infectious diseases (such as Ebola) and violent passengers are both extremely dangerous.