Answer :
Final answer:
The 'Blocked to Unlocked' transition is not valid in the 'Safe Home Access' case study.
Explanation:
In the 'Safe Home Access' case study, the valid transitions between two states of the Controller class are:
- Locked to Unlocked
- Accepting to Unlocked
Therefore, the option 'Blocked to Unlocked' is NOT a valid transition between two states of the Controller class.
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