Four-year-old Sergei can tell his Poppa how to wash the clothes. Yesterday, Sergei told Poppa, "First, get the dirty clothes from the basket. Next, put them in the washing machine. Now, add some soapy stuff. Close the washer lid and press the button. When the buzzer rings, it's all done!" According to Piaget, Sergei has:

A. equilibrated his assimilation.

B. accommodated his laundry fixation.

C. organized his knowledge into schemes.

D. demonstrated that he thinks like a twelve-year-old.

My choice is C.

Your choice is correct. According to Piaget's theory of cognitive development, Sergei has demonstrated the ability to organize his knowledge into schemes. A scheme is a mental framework or blueprint that helps individuals understand and interpret the world around them. In this case, Sergei has organized his knowledge of how to wash clothes into a step-by-step scheme. He is able to explain the process clearly and understands the sequence of actions involved. This ability indicates that Sergei has reached a certain level of cognitive development, which aligns with Piaget's theory. Well done!