It deals with opportunity costs. Opportunity costs are not real costs, but rather the things that you had to give up in order to obtain something else. What you didn't obtain is considered to be an opportunity cost. A production possibility curve deals with this.
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Answer: The stage of cognitive development that Reina is in is the The concrete operational stage.
Explanation: According to Jean Piaget's theory of development, there are four stages of development. They are; sensorimotor; preoperational; concrete; and formal operational stages.
The concrete operational stage occurs in children between the age of 7 to 11 and in this stage, the child has learned to think in a logical manner if they are familiar with the concepts. Reina earning A's on her math tests is because she's already familiar with the concepts of multiplication and division.
Answer:
not understood what r u trying to say
I believe the correct answer is a Democracy
