Researchers Have Compared the Tonnage of Heroin and Cocaine Consumed

Researchers have compared the tonnage of heroin and cocaine consumed in the United States and concluded that:

A) more tons of heroin are used than cocaine.
B) more tons of cocaine are used than heroin.
C) roughly the same tonnage of heroin and cocaine is used.
D) it is impossible to estimate the amount of these two drugs, in tons, that is used.
E) none of the above.