The mobile phone text messages are one of the key communication styles now regular letters

The mobile phone text messages are one of the key communication styles now regular letters.
A. in place of
B. in place
C. in the place of
D. in the place

(答案→)A. in place ofB. in placeC. in the place ofD. in the place解析：考查固定词组。固定词组：in place of代替…；句意：现在代替了通常的书信的手机短信是一个主要的交流方式。BCD三项的搭配都是错误的。

这个答案应该是对的