Correct Answer: D
Explanation:
Option A : The argument is based on an assumption about how the questions are investigated rather than on how well they are answered.
Option B : The argument is not about whether the results are credible, so this assumption is irrelevant.
Option C : The argument does not concern whats not genuine science, so there is no need for this assumption.
Option D : Correct. This statement properly identifies the argument's assumption that the use of scientific method is sufficient to make an enterprise genuine science.
Option E : This assumption does not make the connection required byte argument between the use of scientific methods and a field of study's status as genuine science.
The correct answer is D.