Your question is Investigate Transaction Drops. 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).
How would you investigate a sudden drop in transaction approval rates? Explain how you would validate the metric definition and data quality, decompose the decline by relevant dimensions, identify likely root causes, and prioritize next steps. Assume you can access transaction, response-code, merchant, payment-method, geography, device, and incident-log data.