The Following Are Arguments Against Somatic Gene Therapy, Followed in Each

The following are arguments against somatic gene therapy, followed in each case by a defense against the argument. Which one doesn't make any sense?

A) We shouldn't "play God;" isn't any medical intervention sort of "playing God?"
B) It's not safe; new medical treatments are generally somewhat risky.
C) It might not work; new medical treatments generally have mixed results.
D) It's very expensive; this is true of many new medical treatments.
E) Biologically, it can't work; with more study we might be able to make it work.