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(A)Some scientists believe that accepting “legal limits” of specific metabolites without such rigorous verification goesagainst 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-enhancingsubstances.
(C)The alternative could see the innocent being punished while the guilty escape on the grounds of reasonable doubt.
(D)In the process, they push the human body to its limits and go beyond what is known about the drugs being taken.