Laura is a 23-month-old who loves to play peekaboo. She shows signs of being aware that when her father hides his face behind a book, it still exists even though she cannot see it. In the context of...

Laura is a 23-month-old who loves to play peekaboo. She shows signs of being aware that when her father hides his face behind a book, it still exists even though she cannot see it. In the context of Piaget's stages of cognitive development, Laura is most likely in the __________.

a.
preoperational stage

b.
sensorimotor stage

c.
concrete operational stage

d.
conventional stage