(A) Custom Report
(B) Event Tracking
(C) Custom Dimension
(D) Calculated Metrics
If you want to track user activity like the number of times a user downloaded a product catalog then, you need to have event tracking enabled on your website. Whenever a user downloads your product catalog, the tracking code gets this data and sends this data to Google Analytics in the form of a Hit URL containing a specific Hit Type known as an event. This data will appear in your Google Analytics account and you can exactly find the number of times your product catalog was downloaded.
This question is a part of the Google Analytics Individual Qualification. You can get all the answers with detailed explanation for this exam in our Google Analytics Individual Qualification Exam Answers page.