Which of the Following Best Captures Rachels's Main Argument for the Main

Which of the following best captures Rachels's main argument for the main conclusion in "Active and Passive Euthanasia"?

A) There is no inherent moral distinction between active and passive euthanasia because the morality of either action must be assessed in large part by the agent's motives for killing or allowing one to die.
B) There is an important moral distinction between active and passive euthanasia because a person who lets one die technically does nothing to cause another's death, whereas a person who kills directly causes another's death.
C) There is no inherent moral distinction between active and passive euthanasia because all doctors have taken an oath to do no harm and any act of killing or letting die is a violation of this oath.
D) There is an important moral distinction between active and passive euthanasia because active killing measures such as lethal injection will generally be more painless than the mere cessation of treatment.