Final answer:
The collapse of the cod fisheries in Atlantic Canada resulted from a combination of technological changes, socioeconomic factors, and ecological uncertainties.
Step-by-step explanation:
The collapse of the cod fisheries in Atlantic Canada resulted from all of the above: technological changes, socioeconomic factors, and ecological uncertainties. Overfishing, led by the introduction of modern factory trawlers in the 1980s, caused a decline in the cod population. Socioeconomic factors such as economic and political pressures, along with the tragedy of the commons, contributed to overexploitation. Ecological uncertainties, including the radical restructuring of the marine ecosystem and the impact on other species, have also played a role in the collapse.
Answer: D. All of the above