Your answer would be C. The main information or idea and key details.
Explanation:
Well it can’t be A because your “summary” would technically just say everything that happened word by word which will tire the reader.
B and D can’t be the answer either since it’s just giving out info, and not the main idea.
Just know that the main idea of each paragraph is very important and will get the reader’s attention. So C,which says that your objective would be getting the main ideas and key details to make a good and effective summary.
<u><em>P.S. I know someone has already answered but just wanted to make sure you understand!</em></u>
A good summary of an essay should probably include the main idea of each paragraph, and the main evidence supporting that idea, unless it is not relevant to the article or essay as a whole. A summary does not need a conclusion, but if the original ends with a message to the reader this should not be left out.