What are the recommendations to recover the population of the leatherback turtle?

I. Regulate motor vehicles and eliminate sources of artificial light near important nesting beaches.
II. Establish plastic removal programs.
III. Prohibit the use of gillnets and J-hooks in marine areas near important nesting beaches.
IV. Improve law enforcement to protect nests from poachers and natural predators.
a) I and II are correct.
b) I, II, and III are correct.
c) I, II, III, and IV are correct.