Answer:
(C) William's positive self-concept.
Explanation:
What this example demonstrates is William's positive self-concept. Self-concept refers to the idea that we have of ourselves and our abilities. A person who has a positive self-concept tends to believe himself capable and talented. He is also more likely to be confident and to try new things out. In this example, it seems like William has a positive self-concept, as he reminds his dad that he is good at building with blocks.