Clarissa: The natural sciences would not have made such progress but for the power of mathematics. No observation is worth serious attention unless it is stated precisely in quantitative terms.
Myungsook: I disagree. Converting observations into numbers is the hardest and last task; it can be done only when you have thoroughly explored the observations themselves.
Clarissa and Myungsook's statements provide the most support for claiming that they disagree about whetherClarissa thinks observations deserve serious attention only after they are expressed quantitatively. Myungsook disagrees and says observations must first be thoroughly explored before they can be converted into numbers.
So they disagree about whether natural science requires serious attention to non-quantified observations.
(A) mathematics has been a highly significant factor in the advance of the natural sciences
Wrong. Myungsook does not deny that mathematics is important. She disagrees about when observations should be converted into numbers.
(B) converting observations into quantitative terms is usually easy
Wrong. Myungsook says it is hard, but Clarissa does not say it is easy.
(C) not all observations can be stated precisely in quantitative terms
Wrong. Myungsook says quantification comes after exploration, not that some observations can never be quantified.
(D) successfully doing natural science demands careful consideration of observations not stated precisely in quantitative terms
Correct. Clarissa says observations are not worth serious attention unless quantified. Myungsook says observations must be thoroughly explored before they can be quantified. So Myungsook accepts, and Clarissa rejects, the need to carefully consider observations
before they are in quantitative form.
(E) useful scientific theories require the application of mathematics
Wrong. Clarissa would likely agree, but Myungsook does not clearly deny it.
Answer: (D)