Your company has a main office and five branch offices that are connected by WAN links. The  company has an Active Directory domain named contoso.com.   Each branch office has a member server configured as a DNS server. All branch office DNS servers host  a secondary zone for contoso.com.   The safer ， easier way to help you pass any IT exams.  7 / 90   You need to configure the contoso.com zone to resolve client queries for at least four days in the event  that a WAN link fails.  What should you do（）

• A、Configure the Expires after option for the contoso.com zone to 4 days.
• B、Configure the Retry interval option for the contoso.com zone to 4 days.
• C、Configure the Refresh interval option for the contoso.com zone to 4 days.
• D、Configure the Minimum （default） TTL option for the contoso.com zone to 4 days.