All the residents were evacuated to a safe place, and then the building collapsed. *
A. After all the residents were evacuated to a safe place, the building collapsed.
B. After all the residents were evacuated to a safe place, the building had collapsed.
C. After all the residents had been evacuated to a safe place, the building collapsed.
D. After all the residents had been evacuated to a safe place, the building had collapsed.
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