To ignore all tracked changes in a document you should select the

To ignore all tracked changes in a document you should select the Final option  

Explanation:

Microsoft provides options to track the changes in the document and to track the changes go to Review tab=> Click on Track changes. This will track the changes in the document.

If you want to turn off the tracking or ignore all tracked changes then the user should click on the final option. This provides various options like accept changes, reject changes, no mark up etc.

Document comparison, protection of the document, spell check and grammar are few of the features available in the Review tab.

i think the answer is a or d