题目：
选择题
About writing, which of the following is not correct?
- A. In writing, ideas are usually developed in effective sentences, paragraphs, and often, shorter units of discourse.
- B. Writing is the process of sel＿ecting, combining, arranging and developing ideas.
- C. In writing, the writer is required to demonstrate control of a number of variables simultaneously.
- D. Writing is an extremely complex cognitive activity.
答案：
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