With the Increased Success of the Interdiction of Methamphetamine

With the increased success of the interdiction of methamphetamine,

A) "mom and pop" laboratories began to appear across the country.
B) "mom and pop" laboratories began to shut down as abusers switched to other drugs of abuse and demand dropped.
C) "mom and pop" laboratories began to be replaced by "super-labs" in other countries that produced huge amounts of very pure methamphetamine, which was then smuggled into this country.
D) the demand for methamphetamine increased as casual users wanted to experiment with it.