-trying to fit in
-peer pressure
-abuse
-fun
-for the "high" feeling
-to be popular
-...uhh..idk..lol
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The correct answer is D. Formal operational stage.
There are stages which are intellectual development for piaget's. For example, Formal operational, , concrete operational, preoperational and sensorimotor which occurs during birth to the age of twenty four years.
Piaget's theory shows development of intelligence of development and the reorganization of mental which results from maturation of biological and environmental experience.
Being Exposed to Radiation. Also, being exposed to harmful Toxins.