The Drug Enforcement Administration (DEA) is a US government law implementation organization under the U.S. Bureau of Justice, entrusted with fighting medication sneaking and use inside the United States.
Registration is an allow issued by the enrollment branch of the Drug Enforcement Administration that must be recharged every year. A doctor must get a yearly allow for opiate enrollment.
A is the central nervous system and i think b is the peripheral nervous system
A Carcinogen is a cancer causing agent
I am pretty sure it is B. Metastasis
If the level is not over you stress threshold it can push you to do better
Please elaborate if this does not help.