Correct Answer:
Explanation/Reference:
Note:
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To create a wildcard Alias (CNAME) record for the new domain name
1. Verify that the user account that performs this procedure is a local administrator on the domain controller.
2. In DNS Manager, under Forward Lookup Zones, right-click the new app domain name, and then click New Alias (CNAME). (box 1)
3. In the New Resource Record dialog box, in the Alias name (uses parent domain if left blank) box, type *.
The Fully qualified domain name (FQDN) box displays *. followed by the domain name that you created for apps. For example, *.ContosoApps.com or *.Contoso-Apps.com. (box 2)
4. Next to the Fully qualified domain name (FQDN) for target host box, type the FQDN of the server that hosts the SharePoint sites. (box 3)
* Overview of how to configure an environment for apps for SharePoint
* SharePoint-hosted apps for SharePoint are installed on a SharePoint 2013 website, called the host web, and that have their resources hosted on an isolated subsite of a host web, called the app web. This approach enables you to reuse common SharePoint artifacts, such as lists and Web Parts. When you take this approach, you can use only JavaScript and you cannot use any server-side code.
Reference: Configure an environment for apps for SharePoint (SharePoint 2013)