Your network contains an Active Directory domain named contoso.com. The domain contains two Active
Directory sites named Site1 and Site2.
You discover that when the account of a user in Site1 is locked out, the user can still log on to the servers in
Site2 for up to 15 minutes by using Remote Desktop Services (RDS).
You need to reduce the amount of time it takes to synchronize account lockout information across the domain.
Which attribute should you modify?
To answer, select the appropriate attribute in the answer area.
Point and Shoot:
Answer: 
Explanation:
Enabling reciprocal replication between two sites involves modifying the options attribute value on the site link
object.
http://technet.microsoft.com/en-us/library/cc961787.aspx http://blogs.technet.com/b/askds/archive/2013/01/21/
configuring-change-notification-on-a-manually- createdreplication-partner.aspx
I don’t get what reciprocal replication should has to do with this scenario. Also, modifying the replInterval attribute does not help as it is just impossible to go below 15 minutes!
The answer and explaination are wrong.
You have to modify the options attribute to configure urgent replication. At least this is also described in the given Technet article somewhere…
I agree with this. I think the answer would be the options value and enable change notification. Have the changes replicate immediately after something has been changed would be the best option to have the user locked out as soon as possible.
Agree with den. The Replicate every value will be processed as the nearest multiple of 15 minutes, ranging from a minimum of 15 minutes to a maximum of 10,080 minutes (1 week): https://technet.microsoft.com/en-us/library/cc730954(v=ws.11).aspx
Is needed to change the options: https://blogs.technet.microsoft.com/qzaidi/2010/09/23/enable-change-notifications-between-sites-how-and-why/
Option
Answer is “Options”.
You must enable Change Notifications between Sites