Your company has a main office and two branch offices named Branch Office 1 and Branch Office 2.
The network consists of a single Active Directory domain. The relevant portion of the network is configured as shown in the exhibit

Users in branch Office 1 report that when a new user account is created in Branch Office 2, the account only appears in the global address list (GAL) two days later.

New user accounts created in Branch Office 1 appear in the GAL at Branch Office 2 one day later.

You need to ensure that user accounts created in both branch offices appear in the GAL no more than one day later.

What should you do?

A.
Modify the site link cost for SiteLink1 to 20.

B.
Configure SiteLink1 to be availably every day from 03:00 to 06:00.

C.
Modify the Recipient Update Service to run every day between 18:00 and 22:00.

D.
Configure the Exchange Server server in each office to use the local domain controller for directory access.