Dennis Taunts His 4-Month-Old Sister by Moving His New Kaleidoscope

Dennis taunts his 4-month-old sister by moving his new kaleidoscope back and forth in front of her. He has put his arm out in front of the toy to prevent the baby from getting it. This arm blocks the baby's view of the middle of the toy. Habituation research suggests that the baby __________.

A) thinks the arm is part of the toy
B) does not know that the kaleidoscope has a middle section because she cannot see it
C) assumes that the visible parts of the toy are connected, even though she cannot see the connecting section
D) assumes that the toy has no middle section because she lacks object permanence