Official Explanation
D weakens the prediction of secrecy by establishing that biotechnology companies have a strong motive to
encourage their researchers to publicize results. Therefore, it is the best answer. A and B support the argument
that developments in biological science and engineering would be slowed if the prediction of secrecy were
fulfilled, but do not provide any reason to expect that the prediction will not be fulfilled. The distortion of the
research agenda asserted in C is not relevant to the question of scientific secrecy. E, which says that
biotechnology companies devote some resources to fundamental problems without immediate practical benefits,
is merely consistent with that argument and so does not weaken the prediction.