You have an Exchange organization named contoso.com. All servers in the organization
have Exchange Server 2010 Service Pack 1 (SP1) installed. The organization contains a
mail-enabled Domain Local group named Group1.
Users from outside the organization report that all e-mail messages sent to
group1@contoso.com generate a non-delivery report (NDR).
You need to ensure to group1@contoso.com.
What should you modify for Group1?

A.
The Advanced settings

B.
The Group scope

C.
The Group type

D.
The mail flow settings