Read the following statements:
I. In environmental laws, the polluter pays principle is enacted to make the polluter responsible for paying for the damage done to the natural environment.
II. The precautionary principle emphasizes caution, pausing and review before going for an innovation that may prove disastrous.
III. The precautionary principle is often used by policy makers in situations where there is the possibility of harm from making a certain decision and conclusive evidence is not yet available.
The correct choice is: