(A) Before defining the problem.
(B) After making a change.
(C) After improving performance.
(D) Before making a change.
Explanation
The best time to take a first look at analytics data is before making a change. This allows you to analyze data before and after the change.
Conclusion
This question is a part of the Check your Knowledge section of the “Develop and test strategic decisions” lesson from the YouTube Content Ownership course.