Object permanence involves understanding that something exists even when it is out of our sensory awareness.

That statement is true.

Object permanence is a very important step in a child development. It requires the capability to create a mental representation about that specific object.
This very development make the children understand that their parents do not actually disappear when they're playing a peek-a-boo

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Ithink the answer is d. the lower appellate and trial courts in the state.