How can a human teacher handle a learning mistake differently?

Correct answer: He or she explains the mistake and preserves confidence

The governing concept is formative teaching: a mistake should become a useful step in learning rather than a mere mark of failure. A human teacher can listen to the learner, identify the misunderstanding, explain the correct method in suitable language, and offer encouragement. This personal response can protect confidence while still demanding improvement. Therefore option A is correct. Option B describes only measurement and gives no guidance; option C avoids the learning problem instead of solving it; and option D removes the support that a learner needs. The mechanical teacher in the story represents instruction that can mark answers and assign work, but it cannot respond with the same flexible empathy, patience, and awareness of a child’s feelings. Thus the answer connects the story’s contrast between programmed instruction and human guidance.