A company has a call centre to handle queries and complaints from customers. The company is concerned about the average length of calls and the time that it takes to deal with customers. As part of its balanced scorecard, it has set a target for reducing the average time per customer call. A target for reducing the average time per call would relate to which one of the four balanced scorecard perspectives? A. Customer perspective B. Financial perspective C. Innovation and learning perspective D. Internal business (operational) perspective