QuestionQ40
Real-Time Customer ProfileA data architect is working in a client’s Adobe Experience Platform instance. The client operates an online store and wants to track all customers’ browsing events to personalize their shopping experience. The architect has prepared a new Experience Data Model (XDM) schema for this purpose. The schema contains the following data:

Which field would be best as the primary identity to correlate the event with the customer profile in Real-Time Customer Profile?
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