According to jean piaget's cognitive-developmental theory, a. children actively construct knowledge as they manipulate and explore their world b. children's learning depends on reinforcers, such as rewards from adults c. adult teaching is the best way to foster development d. rapid development occurs during sensitive periods

a. Children actively construct knowledge as they manipulate and explore their world.

Explanation:

Jean Piaget's cognitive development theory says that children construct knowledge through the interaction with their environment. Children use their body to reach, touch, manipulate and feel objects. They construct schemes where they organize the information and with time and new knowledge this schemes will be modified in order to incorporate the new information.

The answer is B

Explanation:

interaction with the environment

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