Which of the Following Is a Key Characteristic of Narcotrafficking

Which of the following is a key characteristic of narcotrafficking?

A) It is a purely domestic issue, and states must therefore deal with the problem individually.
B) The costs of shipping large quantities of product are high, which is why destroying the product at its source can be so effective.
C) The production, refinement, and shipment of narcotics contribute substantially to the economy of many countries.
D) It is an issue completely separate from terrorism, and therefore receives significantly less attention in the international community.
E) It is not an issue that has made it into important policy debates in the United States.