The body of presentation should be simple and logical, because the body of the presentation is the main part of the presentation, so it should have a simple but logical sentence which is easily under stable by people.
Presentation is power of making other people understand the thoughts and ideas of the person's mind, so it should start from the introduction part which consist of sum up of main body.
Then the main body of the presentation in which all the important points must be included, then the key ways at the last conclusion of the presentation.
Thus, option B is correct.
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