Omar, a 6-year-old, asks his mother for pasta in a small bowl as he is not hungry enough to finish a large bowl. He gets annoyed when his mother serves him a little pasta in a large bowl. Looking at the size of the bowl, he thinks that he will not be able to finish the pasta. In the context of Piaget's theory of cognitive development, which of following assumptions can be made about Omar?
A. He has developed a mental representation of the bowls.
B. He lacks an understanding of the concept of conservation.
C. He thinks his mother shares his perspective.
D. He understands the idea of reversibility.
Answer: B
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