D. Look for scientific research about whether these claims are correct or not.
Explanation:
Being a Scientific question, the question should be based more on your ability to find out if the jewelry is made of real material (or the material they claim they used). This can be found by finding their sources of material, and checking professional reviews.
Beaches would shrink until they were no longer there because the sediment is pulled away from the shores by the tide and there would be no new rock sediment to replace the old rock sediment.
