参考答案

正确答案：C
解析：Why did the woman and her husband get down on the ground directly after crawling out of the window?
根据对话中提到的Once we were down safely... The whole first was gone — it was just totally flattened可推测，整个第一层楼全部坍塌夷为平地了，所以他们才直接从窗户跳到地面，故[C]为答案。