Your question is Validating Ad Engagement Hypotheses. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are evaluating whether a change to an in-app ad experience affects user engagement. You need to decide how to test the claim and what evidence would be strong enough to support it.
How do you validate a hypothesis about user engagement with ads?