Answer:
Click on Review Tab=>Compare is the right answer.
Explanation:
Select document 1 that is original document (from the Original document drop down menu). Alternatively you can use “Compare document” dialog box and browse to select the desired document.
Select the “Revised document” menu to select the revised document. Alternatively you can use “compare document” dialog box to browse and select the document.
Click on more button to see all the features / options in the “compare dialog box”
When everything is done click on OK button.
Compared document appear in the middle, original and compare documents appear on the right, revision appears on the left side.