– maps are there on the wall? –There are six. A. How much B. How old C. How many

问题补充：

– maps are there on the wall? –There are six.

A. How much B. How old C. How many

答案：

解析：根据题干的答语可知，询问的是名词的量。Maps是可数名词故用how many来提问。