Which of the following cognitive behaviors would be expected in a three-year-old according to Piaget's theory of cognitive development?

A. Abstract reasoning develops much later, during the formal operational stage (around 11 years and older). A 3-year-old is in the preoperational stage, where abstract reasoning has not yet developed. B. Symbolic play, or imaginative play, is a hallmark of Piaget's preoperational stage, which occurs from about ages 2 to 7. A 3-year-old engages in pretend play, demonstrating their ability to represent objects and actions symbolically. C. Conservation, or understanding that quantity remains the same even when its shape changes, typically emerges in the concrete operational stage (around 7 years old). D. Logical reasoning also develops later, in the concrete operational stage, where children begin to think logically about concrete events.