One major benefit arising out of the 200-mile exclusive fishing zone is, as we understand from the passage, to ____ .

When we turn to the problem of fishing, we see that
through a UN Convention on the Law of the Sea, the
world's nations have indicated that they recognize the
risks of over-fishing. Nations can now declare 200-mile
exclusive economic zones and exclusive fishing zones
and control the catch at a level that is sustainable.
Developing nations seem to be beginning to benefit
from the new fisheries regime which offers the
promise of allowing them to manage fishing resources
for optimum, that is long-term, benefits.