Explanation:
Box 1: Yes
User1 is in east.contoso.com. Group1 is Domain Local group in west.adutm.com.
Accounts from any domain or any trusted domain Global groups from any domain or any trusted domain can be members of Domain Local groups.
Accounts, Global groups, and Universal groups from other forests and from external domains can also be members of Domain Local groups.
Box 2: No
User2 is in the fabrikam.com domain.
Group3 is a Universal group in east.contso.com.
Only accounts from any domain in the same forest can be added as members.
Box 3: Yes
Group2 is a Universal group in contoso.com.
Group2 can grant permissions On any domain in the same forest or trusting forests.
Active Directory Domain Services add to Domain Local group.
Reference:
https://docs.microsoft.com/en-us/windows/security/identity-protection/access-control/active- directory-security-groups