Respuesta :
Answer:
C. He cannot pay attention long enough to learn it
Explanation:
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According to critics of Piaget's theory of cognitive development, The reason why a child might not achieve a cognitive milestone such as conservation or object permanence at a specific age is that;
- He cannot pay attention long enough to learn it.
Jean Piaget's theory of cognitive development can be regarded as a theory which stressed that children move through four different stages of mental development.
For child to fail to achieve a cognitive milestone such as conservation , then it means that cannot pay attention long enough to learn it.
Therefore, the reason why a child might not achieve a cognitive milestone is that He cannot pay attention long enough to learn it.
Learn more about Jean Piaget's theory of cognitive development at;
https://brainly.com/question/13385936