In the sensorimotor stage, progress is seen on three fronts. Which combination best describes these fronts?

• A. Adapting to and exploring the environment; understanding objects; using symbols
• B. Abstract reasoning; language syntax; long-term planning
• C. Mastery of formal logic; abstract algebra; scientific reasoning
• D. Social understanding; moral reasoning; emotional regulation

Answer: (A)

In the sensorimotor stage, progress shows as infants adapt to and actively explore their surroundings, develop an understanding that objects continue to exist even when not seen, and begin using symbols to represent objects and events. Adapting to and exploring the environment comes from forming and refining schemes through actions, as babies learn what they can do to effect change and gather information. Object permanence marks a key shift from just reacting to the world to knowing that things exist even when out of sight, which underpins later memory and anticipation. Using symbols signals the emergence of internal representation, where actions or sounds can stand for something else—an early foundation for pretend play and language.

The other options describe abilities that belong to later stages of cognitive development. Abstract reasoning, language syntax, and long-term planning appear much later, after the sensorimotor stage. Likewise, formal logic and scientific reasoning are characteristic of the formal operational stage, while social understanding, moral reasoning, and emotional regulation develop more fully in later childhood.