What relationship can be selected in a custom report type where accounts is the primary object and contacts is the related object?

The correct choice indicates that in the context of a custom report type where accounts serve as the primary object and contacts are the related object, it is possible for each account to have zero or more related contacts. This reflects the real-world relationship between accounts and contacts, where an account represents a business or organization and can have multiple related contacts (individuals associated with that business or organization), but it is also feasible for some accounts to have no associated contacts at all.

By choosing this option, the report would capture all accounts, providing visibility into those with and without associated contacts. This flexibility is crucial for comprehensive reporting and analysis, allowing organizations to understand their client base better and identify potential gaps where contact relationships may need to be established or improved.

In contrast, the other options do not accurately represent the nature of the relationship between accounts and contacts. Some suggest a requirement for related contacts or an impossibility of having them, which contradicts the realities of how accounts and contacts function within systems like Financial Service Cloud.