A. Using a JavaScript UDF that iterates through the session data, extracts the event types, adds them to a JavaScript Set to ensure uniqueness, and then converts the Set to an array. This array is returned as a result. (Single Correct Answer)

B. Creating a SQL UDF that utilizes Snowflake's ARRAY AGG and DISTINCT functions to aggregate all event types from the session data into an array, ensuring uniqueness. (Single Correct Answer)

C. Implementing a Java UDF that parses the session data, extracts the event types, uses Java's HashSet to guarantee uniqueness, and returns the HashSet as a comma-separated string. (Single Correct Answer)

D. Using an external function with a remote service to process 'session_data' and return JSON array with distinct event types. The external function setup must include API integration with the third party service and Role based access control. (Single Correct Answer)

E. All of the above can satisfy the question. (Single Correct Answer)