What approach should be recommended?

Northern Trail Outfitters (NTO) is launching a new subsidiary brand, Cloud Kicks, within the next six months. Cloud Kicks anticipates sending approximately 50,000 emails per month from a child business unit. NTO will execute a large campaign announcing and associating itself with Cloud Kicks as part of the brand kickoff and is comfortable sharing digital properties with them. Cloud Kicks wants to utilize a custom sending domain, but deliverability is a primary concern.

What approach should be recommended?
A . A new Sender Authentication Package should be used for NTO.
B. A Private Domain should be applied to the parent business unit.
C. A Private Domain should be applied to the child business unit.
D. A Sender Authentication Package should be used for CloudKicks.

Answer: C