There are three broad categories of structuring argumentative essays. Please select from the following statements the one that correctly describes the features of given approach.
A、Integrated model: In this model, some elements are contained in one paragraph and others are contained in another paragraph that follows. 
B、Semi-integrated model: In this model, all elements are contained in one paragraph.
C、Split model: In this model, the elements are spread out over several paragraphs.