In the classical world, historians often described past events as caused by fate, gods, or other supernatural factors. Today, historians study the same events as classical historians, but rely on historical evidence to support their conclusions. The conclusion that best support this is option C. The accepted interpretations about past events can change greatly over time.
In the past, some unknown occurrence was described as 'supernatural'. Nowadays, those explanation would not be accepted, since any explanation should be supported by the actual data and evidence.