Too much fishing effort leads to excessively high catches

Which of the following most logically completes the argument below?
Too much fishing effort leads to excessively high catches, labeled "overfishing" when annual volumes exceed ecologically sustainable levels. In order to bring total catch down to an ecologically sustainable level, authorities propose to introduce Total Allowable Catches (TACs), a quota on the number of fish a boat can bring in. This proposal, however, is ill conceived, since
A. many fishing boats remain at sea for months at a time
B. for ocean environments that have been devastated by overfishing, replenishing them would be economically unfeasible
C. there are no known previous examples of authorities imposing fishing quotas
D. the only way to provide for growing human populations is to rely heavily on sustenance derived from the ocean
E. quotas frequently lead only to fishers discarding already dead fish back into the ocean

source - ready4gmat