A customer is starting a new children's fashion brand and wants to use a dedicated...

Comprehensive and Detailed Explanation:

The correct answer is D — Select "Subscribers will be unsubscribed from this business unit only" in Settings.

This setting ensures that if a subscriber unsubscribes from the children's brand (child business unit), they are only removed from communications for that BU — not for the main Enterprise brand.

It's the easiest, no-code-required solution ideal for customers with minimal technical resources.

❌ Why others are wrong:

A: Separate Subscription Center would require building and maintaining separate pages, adding complexity.

B: Managing unsubscribe status manually through attributes would be a heavy lift without developers.

C: Business Unit Filters manage viewing access, not opt-out behaviors.

Exact Extract from Salesforce Official Documentation:

Salesforce Help — Business Unit Settings and Unsubscribe Management:

"To allow independent unsubscribe management, select 'Subscribers will be unsubscribed from this business unit only.' This setting ensures opt-outs affect only the business unit where the unsubscribe occurred."

(Source: https://help.salesforce.com/s/articleView?id=sf.mc_es_business_unit_unsubscribe_settings.htm )