Probably C or D but I recommend you try process elimination and just do the answer that BEST matches it
Answer: Introduction: draws the readers' attention, Body paragraphs: each with only one main idea and Conclusion: the key points in a few sentences.
Explanation: When writing an essay or a paper, there are three main parts on the structure of the text. First we have the introduction which most contain the central idea of the text, and also the reasons behind the essay or investigation, this helps to draw the reader's attention. Then we have the body paragraph, each one of them should develop just one main idea. And finally we have the conclusion, which must summarize the most important points in a few sentences.
C because it's the most detailed explanation and answer. It goes over beginning middle and end