What Is the Difference Between Killing Someone and Allowing Someone

Multiple Choice

What is the difference between killing someone and allowing someone to die, according to Nell?

A) Person A kills person B when A intentionally acts so as to bring about B's death. A allows B to die when A does not carry out any action and B dies as a result.
B) Person A kills person B when A commits a positive action to cause B's death. A allows B to die when A carries out a negative action that results in B's death.
C) Person A kills person B when A causes B's death and B would not have died if A did other acts or had no causal effect on the situation. A allows B to die if B would have died anyway, even if A had no causal effect on the situation.
D) Person A kills person B when A causes B's death intentionally, and B's death is a certain and immediate consequence of A's action. A allows B to die when A causes B's death unintentionally, and B's death is neither a certain nor an immediate consequence of A's action.