According to Piaget, the 6-month-old infant should be in which developmental stage?
Correct Answer: B
Rationale: According to Piaget's theory of cognitive development, the 6-month-old infant would typically be in the stage known as primary circular reactions. This stage occurs from around 1 to 4 months of age up to about 1 year old. During this stage, infants begin to repeat actions that bring them pleasure or interesting results, such as sucking their thumb or repeating simple movements like kicking. These repetitive actions are circular in nature because they involve the infant's own body, and they serve as the building blocks for more complex interactions and understanding of the world. This stage is characterized by the infant's increasing ability to coordinate sensory information with motor actions, laying the foundation for further cognitive development.