Answer: The correct option is option "b. Consistent; Existential
Explanation: Renée Baillargeon and her colleagues, studied the sense in children and infant, and how their understand the environment. They discovered that infant as young as three to four months wants a object to be consistence, this explains why infant of three to four months cry most when they can't see their mother, and will always want to be carried by their mother, this is because they have seen their mother as an object which should not be moved from their sight.
They also observed the infant of three to four months cry when their can't see their mother because, they believe their mother is still in existence even though it is hidden from they sight, so they cry to call back her attention to come back to sight.
