Answer:
The suitable answer for the following question will be B. Contents.
Explanation:
The topics that are covered by the document, book or any project report known as Contents or the formal division of any type of document or book. It will help us a lot by showing the parts of the book in a serial way that's why it can be the best suitable heading for any project report.
There are some reasons why the other options are not suitable for that investigative report :
Table of contents is in a form of headings like heading 1, heading 2 etc is not related the contents.
Executive summary is a short part or section of any document, this one also not relatable.
Hence, these option are not considered as a right answer.
