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(A)Some scientists believe that accepting “legal limits” of specific metabolites without such rigorous verification goes
against the foundational standards of modern science.
(B)These were just a few in a long line of cases in which competitors had been accused of using performance-enhancing
substances.
(C)Drug testing should not be exempt from the scientific principles and standards that apply to other biomedical sciences.
(D)In the process, they push the human body to its limits and go beyond what is known about the drugs being taken.