What is the principal advantage of reporting drug concentrations in SI units?
a. SI units are easier to measure.
b. SI units are easier to calculate.
c. SI units are expressed in the same way regardless of whether the sample is taken from breath, blood, or urine.
d. SI units allow for direct comparison of concentrations of different drugs in the blood.
e. SI units are reported in percentages, which allow for direct comparison of drug intoxication levels across individuals.
Answer: D
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