When appending data to links via Web Analytics Connector, which parameter should be used to track subscriber behavior?

A developer is creating a custom preference center and wants to log unsubscribeevents from the CloudPage.
Which set of parameters should be captured and provided to the LongUnsubEvent Execute Call to ensure accurate unsubscribe information?

A developer wants to build an email that dynamically populates the physical address of a company's locations using the variable address. The deployment goes to millions of subscribers and the developer wants the fastest possible performance.
Which AMPscript solution should be recommended?

A developer wants to design a custom subscription center in CloudPages. The developer prefers to code in AMPscript, but is also skilled in Server-Side JavaScript. While the developer is confident their code is of high quality, they would still like to handle unexprected errors gracefully to ensure the best user experience. Which feature should handle this scenario?

Certification Aid wants to trigger and email send in Marketing Cloud when a purchase is made on their website. Which API should be used for this? Choose 2.