Teens realize that things may be “shades of gray” after they enter piaget’s a identity crisis stage. b social stage. c menarche stage. d formal operational stage.

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.

answer; i believe the correct answer is (secondary prevention);