Answer:
The correct answer is At the beginning.
Step-by-step explanation:
Executive Summary is written at the beginning of the document. An Executive summary can be written to summarize the document which can be a report, or a thesis, or an article or a journal. Executive Summary gives an insight into the essence of the document. Executive Summary does not give us information about the details and background of the document, it only gives a rational approach to have an essence of what is written in the following document. A person who only reads the executive summary will not be able to find out the details and backgrounds of the written document.