Based on business writing styles, If a formal report is very long, an Executive Summary briefly summarizes the most important information in the report allowing managers to decide whether or not to read the entire document or just parts of the document.
Executive Summary is the part of the formal report that contains all the necessary details of the formal report.
Executive Summary allows the readers to have an overview of what is in the formal report, thereby making the readers get informed of the complete information of the formal report.
Hence, in this case, it is concluded that the correct answer is Executive Summary.
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