Answer:
Review Tab is the correct answer to the given question .
Step-by-step explanation:
Giving the permission to file in word 2016 
- Click on the Review tab and select the restrict tab .
 
- Chose the option allow this type of editing .
 - After that choose the option No changes .
 - Pick the section of the document they want to authorize the adjustments.
 - After that there are multiple option are seen select accordingly as user need and press ok button .
 - Click on the start permission there is option is seen Start enforcement and press the button option start Enforcing Protection.
 - After that feeding the password if the user need the password is in encrypt form then press encrypt option and click ok .
 
If the user need to read the file 
- Click on the Review tab and select the restrict tab .
 - After that choose the option "Stop Protection" .
 - Giving the password you are feeding in the permission of file .
 - Finally the user will edit the document