A Developmental Researcher Creates a Special Apparatus That Makes It

A developmental researcher creates a special apparatus that makes it appear to 4-month-old Violet that two different objects are in exactly the same spot at exactly the same time. Violet seems to be quite surprised by what she sees. Given what you have learned about children's early knowledge of scientific phenomena, you would be most likely to conclude that Violet's reaction is:

A) Quite typical for her age-group
B) A bit unusual, as children are usually at least 15 months old before they understand that two objects cannot occupy the same space at the same time
C) Quite unusual, as children are usually at least 5 years old before they understand that two objects cannot occupy the same space at the same time
D) Probably a fluke, as most 4-month-olds have poor visual perception