Conclusion:
Funding for human gene research should be reduced, other genetic research increased
Premises:
human gene research has billions of bucks and few practical consequences
other practical projects are underfunded
Our correct answer will utilize a general rule of some kind to validate the reasoning above.
(A) there is no discussion about how many people will be helped.
(B) we sort of already know this -- this doesn't support the author's conclusion, it's more like it repeats a premise
(C) this does not support the authors' conclusion about fudning.
(D) here it is! practical experiments are better than non-practical ones. This is an exact match for our argument.
(E) media attention is out of scope here and inapplicable to the argument as it is written.