GRE Reading Comprehension: ETS-GRE阅读ETS - 6S7Z4V5_Q1PP994E7

The author implies that scientists develop a healthy skepticism because they are aware that A. mathematicians are better able to solve problems than are scientists B. changes in axiomatic propositions will inevitably undermine scientific arguments C. well-defined situations are necessary for the design of reliable experiments D. mathematical solutions can rarely be applied to real problems E. some factors in most situations must remain unknown