Critical Reasoning (CR) | Re: Excavation of the ancient city of Kourion on the island of Cyprus reve

Bit confused. If coins post AD 365 are not found how does this fact suggest that the town was destroyed by earthquake itself? The town might have been destroyed by flood or some other natural disaster. Option C does reiterate a known fact but modern histories of Cyprus validates archaeologists' hypothesis. Or does it not?

Thanks for you answer

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