Eight-Month-Old Baby Lucy Picks Up a Toy in Her Crib

Eight-month-old Baby Lucy picks up a toy in her crib and accidentally hits her crib with the toy, making an interesting noise.She begins to drag the toy back and forth against the sides of the crib's railing, producing another different and interesting sound.This prompts Lucy to continue repeating the action over and over again.Piaget would say that this is an example of

A) Substage 1: Simple reflexes.
B) Substage 2: First habits and primary circular reactions.
C) Substage 3: Secondary circular reactions.
D) Substage 4: Coordination of secondary circular reactions.