POPs Such as Dioxins and PCB's Are Transported into Arctic

POPs such as dioxins and PCB's are transported into arctic ecosystems and food chains by

A) global air patterns and then deposited on snow from where they enter streams and plankton.
B) being eaten by fish when toxic materials are dumped into oceans.
C) local industries run by native people which use toxic chemical processes.
D) ocean currents which contaminate local streams.

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