Which of the Following Is NOT an Example of a Conceptual

Which of the following is NOT an example of a conceptual slippery slope?

A) If we can permit aborting a 26-week old fetus because it tests positive for Down syndrome, why can't we let die a 39-week old baby because it is born with Down Syndrome?
B) If a miserable quality of life should allow a physician to help a competent patient die, why shouldn't a miserable quality of life allow a physician to help an incompetent patient to die?
C) "The real ethics of American physicians remains largely untested. Once physicians no longer make money keeping patients alive but start to make money helping patients die, no nursing home patient in America will be safe."
D) If your motive is to kill a person and the result is death, both in letting die and in killing, and if society permits letting die, why shouldn't society permit killing?
E) Because we have already accepted that some severely retarded elderly patients in mental institutions have lives that are not worth living, shouldn't we also accept the same for institutionalized, severely retarded neonates?