When do simple reflexes occur in Piaget's four stages?

A) at the beginning of the concrete-operational stage
B) at the beginning of the sensorimotor stage
C) at the end of the preoperational stage
D) at the end of the formal-operational stage

Sensorimotor Stage

The first stage in Piaget's theory of cognitive development, where infants learn through interacting with their environment, developing motor coordination and knowledge of the world.

Concrete-Operational Stage

A stage in Piaget's theory of cognitive development where children, usually aged 7 to 12, develop logical thinking but are not yet capable of abstract thought.

Preoperational Stage

The second Piagetian developmental stage, which lasts from about 2 to 7 years of age, when children begin to represent the world with words, images, and drawings.