During this stage, children have an inability to realize that there are other viewpoints beside one's own. A)sensorimotor
B)preoperational
C)Concrete operational
D)formal operational

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sensorimotor, preoperational, concrete operational, formal operational.

Explanation:

Cognitive development can be defined as the development of thought processes, skills, knowledge and problem-solving abilities from infancy through adulthood.

Jean Piaget was a developmental biologist and psychologist who worked extensively on cognitive development in infants and teenagers; these are judgement, knowledge and thoughts.

Jean Piaget's stages of cognitive development in order are;

I. Sensorimotor: this is between 0 - 2 years (18 - 24 months).

II. Preoperational: this is age 2 - 7 years.

III. Concrete operational: this is age 7 through age 11.

IV. Formal operational: this is from adolescence (11 years) through adulthood

B as in this stage there is symbolic thought.