Answer:
The correct answer is D. customer perspective.
Step-by-step explanation:
A Balanced Scorecard measure is a tool used to identify various internal business matters and functions and improve their external outcomes.
It has four perspective namely Financial, Customer, Learning Process and Growth.
In customer perspective, the firm focuses on a variety of factors and better their interaction with the customers. It can include different measures like advertise cost, complaints resolved on first hand, rate of sales returns to name a few.