Why Does Nell Discuss Lifeboat Situations in Her Paper

Why does Nell discuss lifeboat situations in her paper?

A) Nell argues that the situation of Earth is not similar to lifeboat situations.
B) Nell discusses lifeboat situations to show that sometimes we have a duty to kill others to save more people, including ourselves.
C) Nell uses lifeboat situations to argue that ships have duties to carry sufficient lifeboats to avoid underequipped lifeboat scenarios.
D) Nell discusses lifeboat situations to show that there are cases where the right not to be killed unjustifiably is violated although the death is the result of the action and is not an immediate, certain, and intended consequence.