Concept:Effective teaching focuses on understanding students' reasoning, not just the final answer.Explanation:The teacher first asks students to form the smallest and largest four‑digit numbers using digits 7, 8, 4, 6 without repetition. Then she asks them to explain the procedure they used. This shows she values the thinking process behind the answer, not just the correct number. By having students write down their procedure, she can identify their understanding of place value and ordering. This helps her plan future lessons according to their needs. Options A, B, and D are incorrect because the teacher is not saving assessment time, managing discipline, or confusing students. She is genuinely interested in their thought process.Answer:C. the teacher wants to understand the students' thinking process involved in the answers given by them.