"Passive euthanasia" can be classified as which of the following?

A) a passive act of not taking steps to prolong life
B) a deliberate act via a definite action that results in killing someone (including oneself)
C) injecting a patient with a lethal overdose of narcotics to end his/her suffering
D) all of these choices

Passive euthanasia is defined as the withholding or withdrawal of life-sustaining treatment or medical intervention, and is often referred to as "letting die." It is different from active euthanasia which involves a deliberate act to end someone's life. Injecting a patient with a lethal overdose of narcotics (choice C) would be an example of active euthanasia, not passive. Choice B is a definition of active euthanasia. Therefore, the best choice is A.