You need to recommend a solution to minimize the number of remote SMTP hosts that identify email messages sent by Margie s Travel users as spam.

What should you include in the recommendation?

A.
a sender policy framework (SPF) record in the internal DNS zone of the contoso.com domain

B.
a sender policy framework (SPF) record in the internal DNS zone of the margiestravel.com domain

C.
a sender policy framework (SPF) record in the public DNS zone of the contoso.com domain

D.
a sender policy framework (SPF) record in the public DNS zone of the margiestravel.com domain

E.
a service location (SRV) record in the public DNS zone of the contoso.com domain

F.
a service location (SRV) record in the public DNS zone of the margiestravel.com domain