Which of the following statements are 对 about discourse analyzing the newspaper article? ( )
选项：

A:The article itself is the primary reading focus.
B:We need to study the construction and function of the article, working from the detail of its language use to some conclusions about the function it might be serving.
C:We need to pay close attention to the way the article differs from other articles on the same topic and note that these differences can be explained in terms of function.
D:We need to investigate how the article reflects the journalist’s opinion or attitude.