Hi there!
So basically... A is true because any type of jewelry could cause contamination, B is true because don't stones tear gloves?! C is also true because who says you can't wear your wedding band... right? This leaves us with D. Next time I recommend you to slash the trash. Use the process of elimination. It helps! Hope this answer has helped you. Have a great day.
Answer:
Formal operations
Explanation:
During formal operational stage adolescents<em> gain the ability of abstract thinking and its application, they can manipulate ideas in their heads without any dependance, they also begin to think creatively and can do mathematical calculations.</em>
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Cuz without it we wouldn't be able to do our business