0. With reference to Piaget's stages of cognitive development, match the following.
| Stage of Cognitive Development | Characteristic |
| A. Sensori motor | 1. Think logically about objects and events. |
| B. Preoperational | 2. Recognise self as an agent of action and begin to act intentionally. |
| C. Concrete operational | 3. Differentiate self from objects. |
| D. Formal operations | 4. Thinking is still egocentric; has difficulty taking the viewpoints of others. |