Answer:
Correct answer is D, Customers.
Step-by-step explanation:
Eighty percent of your business comes from the twenty percent of your Customers.
Established businesses have loyal customers who purchase the product of the company, no matter where they go. They are loyal to their brand. These are the customers that generate eighty percent of your business. These are the core customers of the company. Other business comes from the rest of the eighty percent who comes and goes.