i dont think that its A), because she says "it can
lead to cures for human ailments" and not that it "is justifiable only
if it leads to cures for human ailments"
IMO its C) or E)
C) because she uses "value" in two different ways. first "preservation of life" which has stronger impact than her second describtion of values as "beauty" and "convenience"
E) in her first argument she point out the "preservation of life", but she does not support it in her second argument by saying that it supports human life. how does the support of human life actually save lifes ?
i think that C) is more a logical flaw than E) is. E) is more like the conclusion of the logicial flaw. so i will go with C)
If your mind can conceive it and your heart can believe it, have faith that you can achieve it.