The outline which contains the specific purpose, the introduction, all main ideas withsupporting material, and a conclusion is
a) the delivery outline. b) the preparation outline. c) the numerical outline. d) the preliminary outline.

B). The Preparation outline.

Explanation:

'The preparation outline' is illustrated as the harbinger for preparing the framework or blueprint of a speech. Such an outline primarily consists of an introduction followed by the body that involves the evidence or supporting material that would back the central idea and the concluding part that would sum up the entire speech along with the author's personal remarks or suggestions. Such outlines intend to serve a specific purpose and hence organizes or structures the content accordingly. Thus, option B is the correct answer.

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