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.
You need to configure the contoso.com zone to ensure that clients cache records from the
zone for 4 days.
What should you do?

A.
Configure the Minimum (default) TTL 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 Expires after option for the contoso.com zone to 4 days.