Final answer:
Option (B), The max number of object relationships to a custom report type in Salesforce is 10. This limit enables the creation of comprehensive reports that include multiple related objects.
Step-by-step explanation:
The maximum number of object relationships you can have in a custom report type in Salesforce is b. 10. This defines the limit to how many related objects you can include when designing a report type. For example, if you have a custom object that relates to other objects like accounts, contacts, or opportunities, you can build a report type that includes up to ten of these related objects to create comprehensive reports that span across multiple areas of your Salesforce org.