Answer:
Option D
Step-by-step explanation:
The answer is option D or "all of the above." Environmental protection main objectives are to conserve natural resources (things such as water, land, and forests). Which means they are against harming ecosystems and help ensure these ecosystems aren't destroyed by humans. Cost is a difficulty because conversing natural resources such as ecosystems isn't cheap, unpredictability because no one is aware of the damage done to these natural resources in till they start trying to reverse the damage, and then sustainability to ensure the natural resources (after fixing what was damaged) stay the way they are, sustainability is of course important.
Hope this helps.