Final answer:
The two data sources that must be incorporated inside Contact Builder are A. Customer Data and B. Event Registration.
Step-by-step explanation:
To incorporate data into Contact Builder in Journey Builder, the entertainment company should include two data sources: Customer Data and Event Registration. These two data sources will provide the necessary information about the customers and the events.
The Customer Data source will have the email address, first name, last name, and other customer-related information. The Event Registration source will include the email address, event ID, event name, event type, and other event-related details.