A sales user has entered his org login password incorrectly several times which caused his account to be blocked. How would Salesforce Admin resolve this issue?

Answer options:

A.Reset the user password through the user record
B.Click unlock on the user record
C.Contact Salesforce to unlock his record
D.Contact the user to reset his password

Correct Answer: B 
Users can be locked out of their org when they enter incorrect login credentials too many times. Unlock users to restore their access. The Password login attempts will be automatically reset after unlocking the account for the first time after the Account lock has been released. Henceforth, it will be counted as new. 
Option A is incorrect because resetting the user password does not unlock its user record. 
Option C is incorrect. We contact Salesforce only for support tickets. Only Salesforce Admins have the power to unlock the user. 
Option D is incorrect because the user doesn’t have the ability to reset the password since his user record is locked. 
Reference: 

https://help.salesforce.com/articleView?id=users_unlock.htm&type=5