Final answer:
Formal presentations of specific healthcare plans likely need to be reported to UnitedHealthcare, due to product information and compliance with regulations.
Step-by-step explanation:
The question addresses which types of events John is planning for UnitedHealthcare need to be reported to the company. Among educational events, formal presentations of specific healthcare plans, and informal marketing events, it is most likely that the formal presentations of healthcare plans would need to be reported, as they involve specific product information and may have implications for compliance with healthcare regulations or company policies. Marketing events focused on healthcare and educational events may be subject to less stringent reporting requirements unless they involve specific endorsements or product presentations. It is important for John to be mindful of the subject matter and format of each event, ensuring compliance with all relevant policies and regulations.