The root key is the one thing you can never easily replace, so it signs almost nothing. Everything about intermediates follows from that.
Make your first attempt
What would you say before reading the answer?
- 01 State the assumptions your answer depends on.
- 02 Explain the mechanism and choose a control.
- 03 Name a condition that would change your decision.
The worked answer includes an approach, scoring criteria and follow-up questions. Compare the reasoning with your own.
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