Answer:The formal operational thinking
Explanation:
According to Jean Piaget the formal operational stage begins at the age of 12 until we are adults.
At this stage our thinking is more advanced we can understand abstract and theoretical concepts and we able to logically analyse situations before we can come up with an effective solution. we are also able to use deductive reasoning.This exactly what Rudy is doing using her logical thoughts and deductive reasoning to understand the consequences that may arise if he doesn't obey his father.
Deductive reasoning allows us to predict the outcome of a situation and it's is crucial in this stage.