HOTSPOT
You have an Exchange Server 2013 organization that contains four servers. The servers are
configured as shown in the following table.
You run Get-TransportConfig and receive the output shown in the exhibit. (Click the Exhibit button.)
Use the drop-down menus to select the answer choice that completes each statement.
Answer: 
https://technet.microsoft.com/en-us/library/dd351027(v=exchg.150).aspx
LocalOnly A shadow copy of the message should only be made on a transport server in the local Active Directory site
True, but inside is written too:
“If the primary server isn’t a member of a DAG, the primary server connects to a different Mailbox server in the same Active Directory Site, regardless of the value of the ShadowMessagePreference parameter.”
It does not change anything just adds chiaroscuro 🙂
The duration is 3 hours and not 2 days.
i.e. the shadow server promotes itself as the primary server, promotes the shadow messages as primary messages, and transmits the messages to the next hop. The time interval is controlled by the ShadowResubmitTimeSpan parameter.
I.e. 3 hours.
https://technet.microsoft.com/en-us/library/dd351027(v=exchg.150).aspx