What must you follow in dealing with a blood sample if you are involved in drug testing?

What must you follow in dealing with a blood sample if you are involved in drug testing?
A . The chain of custody
B . Law enforcement instructions
C . Patient instructions
D . None of these

Answer: A

Explanation:

The chain of custody dictates the way in which a sample will be taken and how it will be guarded against tampering before, during and after testing. Make sure you know the regulations in place and follow them closely, otherwise you may be called upon to explain why you did not.