A nurse in the pediatric clinic is discussing Piaget's theory of cognitive development with a newly licensed nurse. The nurse should review which of the following types of thinking that occur during adolescent development?

The correct answer is D: Abstract thinking. During adolescent development, individuals are capable of abstract thinking, which involves reasoning about concepts, ideas, and possibilities beyond concrete objects. This ability allows adolescents to think critically, solve complex problems, and understand hypothetical situations. Egocentric thinking (Choice A) is characteristic of the preoperational stage in younger children, where they struggle to consider others' perspectives. Preoperational thinking (Choice B) refers to the early childhood stage in Piaget's theory, where children lack logical reasoning and rely on intuition. Concrete thinking (Choice C) is characteristic of the concrete operational stage, where children can think logically about concrete objects and situations. Abstract thinking (Choice D) is the most advanced stage in Piaget's theory, where individuals can think symbolically and conceptually.