英语完形填空When we talk about the universe,we mean the earth,the sun,the moon and the stars,and the space( ) them.A.in B.between C.among D.on答案上说是B,但为什么不选C.among?在三者或三者以上的中间,不应用among吗?希望大家帮我释疑

英语完形填空
When we talk about the universe,we mean the earth,the sun,the moon and the stars,and the space( ) them.
A.in B.between C.among D.on
答案上说是B,但为什么不选C.among?在三者或三者以上的中间,不应用among吗?
希望大家帮我释疑