Skim the article and see what word is used the most is not a strategy to help identify the central idea. Thus, the option (c) is correct.
What is the central idea?
The central idea refers to the text is mainly known about on is rectify the theme and the message. The central idea can most often be stated in one sentence. The central idea is rectify the message of the story as based on which topic. The central idea is the highlight of the main words of the topic.
The sentence is skim is the article are to rectify they are more frequently used the word. Appropriately the most word are highly used is called as central idea. The careful read of the passage and the story are automatically clear of the central idea. The elaboration as skimming they deliberately choose the correct details.
Therefore, option (c) is correct.
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