Lukas conducts a research on 50 children. He divides the children into 2 groups, A and B, with 25 children in each group. He shows both the groups five vegetables, out of which three are tomatoes. He then asks each group if there are more tomatoes or more vegetables. Group A answers that there are more vegetables than there are tomatoes, and group B answers that there are more tomatoes than there are vegetables. Which of the following can be inferred from this study?
A. Group B understands the relationship between a whole and its parts.
B. Group A consists of children who are in the preoperational stage of Piagetian cognitive development.
C. Group B understands the relationship between two objects by knowing the relationship of each to a third object.
D. Group A consists of children who are in the concrete operations stage of Piagetian cognitive development.
Answer: D
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