英语专四的一道语法题,

问题描述:

英语专四的一道语法题,
Britain's press is unusual( ) it is divided into 2 very different types of newspaper:the quality press and the popular press.
A in how B in what C in which D in that
答案上说是D,但我想A才对啊,是不是答案写错了?

in that 表示因为 所以选它
in how 没有这样的说法