Answer:
Option A
Step-by-step explanation:
The carrying capacity of any given ecosystem is the maximum production that is achieved without environmental degradation. Now, since the production in option B and C is less than 500,000 tons (i.e carrying capacity of Grand Banks of Newfoundland), thus the rate of population growth would not be greatest and hence both option B and C are incorrect
Option D is also incorrect as production cannot be greater than carrying capacity or else environment will start degrading
Hence, option A is correct