You are the SharePoint Online administrator for Contoso, Ltd. The company purchases an Office 365 Enterprise El plan. The public-facing website must use
SharePoint Online and the custom domain contoso.com.
You need to configure the DNS settings for the public-facing SharePoint site.
How should you configure the DNS settings? Select the appropriate options from each list in the answer area.
Answer: 
Explanation:
https://support.office.com/en-za/article/Use-a-custom-domain-name-to-rename-your-Office-365-Small-Business-public-website-58f5adda-e52a-49ca- 9244-
93c7d93e3272?ui=en-US&rs=en-ZA&ad=ZA