This type of sample can show evidence of long term drug use.
A. breath
B. feces
C. hair
D. saliva
Answer: C. hair
This type of sample can show evidence of long term drug use.
A. breath
B. feces
C. hair
D. saliva
Answer: C. hair
A. breath
B. feces
C. hair
D. saliva
Answer: C. hair
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