Maria is 8 years old and is learning to use numbers in school. Most likely she is in the stage of development,
A. formal operations
B. sensorimotor
C. concrete operational
D. preoperational

The correct answer is C. concrete operational

Explanation:

The stage of concrete operations is a period of development proposed by the Swiss psychologist Jean Piaget in his Theory of Cognitive Development. This stage begins more or less at age 7 and ends at 11, being the third in theory, coming after the pre-operational stage and before the formal operations stage. During this stage, children acquire a better capacity to perform operations related to the mass, the number, length, and weight of objects. They are also able to better order objects, in addition to being able to establish categories and organize them,that is, they organize their ideas, developing better rational, logical, and operational thinking.

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