单选题 Experience suggests that small, integrated organizations can operate ______ in critical situations than large firms can.
A. efficiently B. more efficient
C. efficiency D. more efficiently

【正确答案】 D
【答案解析】[解析] 对比较级+than结构进行提问的问题。空格处的单词既要和后面的than相呼应，同时又要修饰动词operate。