Custom Dimension collects company-specific data such as Member Status.
- Event Tracking
- Custom Filter
- Custom Metric
- Custom Dimension
The correct answer is: Custom Dimension
Explanation: In many cases, you’ll have the option to use events, screen views, and/or a custom metric to track your most important metrics. However, custom metrics can produce more flexible and more readable custom reports and as such are a convenient way to track your most important metrics
Read more here: https://support.google.com/analytics/answer/2709828