Answer:
The correct answer is d.
Step-by-step explanation:
This stage extends from birth to the acquisition of the individual's language. Children build step-by-step knowledge and understanding of the world by coordinating experiences (such as sight and hearing) related to physical interaction with objects (such as grabbing and stepping).
The development of the permanence of the object is one of the characteristic achievements of this stage. Object permanence is the child's understanding that objects continue to exist even though he or she cannot perceive them.
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