Developing Nations Produce Much More Seafood by Aquaculture Than Developed

Developing nations produce much more seafood by aquaculture than developed nations because:

A) They have more access to suitable warm water marine ecosystems with coastal upwellings that are best suited to aquaculture.
B) the breeding cycles of the fish are in keeping with the seasons in these regions.
C) the type of fish that can be raised in aquaculture are more suited to their diets.
D) they have abundant cheap labor as aquaculture is labor intensive.