Welcome to your interview.
The question is on your right: Sell and Expand a Difficult Account. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Give me an example where you dealt with a difficult account and upsold additional services within the same customer relationship.