The director of customer service at Northern Trail Outfitters wants to capture and trend specific business events that occur in Salesforce in real time. The metrics will be accessed in an ad-hoc manner using an external analytics system. The events are as follows:

A customer initiates a product exchange via a Case.

A customer service rep clicks on the "Authorize Exchange Product" menu item in the Case.

A customer initiates a subscription cancellation via a Case.

A customer service rep clicks on the "Initiate Refund" menu item in the Case.

Which solution should meet these business requirements?