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A bug appears around dicts. What is the strongest first debugging move?

Multiple choiceEasychapter-3-curatedpremiumcore-collectionsdicts
python
order = {"id": "ORD-9", "subtotal": 89.50, "currency": "USD"}
print(order["id"], order["subtotal"])
Choose one answer
Answer and explanation

Correct answer

D. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.

Why

That approach is reliable because it creates evidence. Blindly passing around giant dictionaries without clarifying their expected keys creates fragile code.

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