The Key Concept Behind the Service-Profit Chain Is

Multiple Choice

The key concept behind the service-profit chain is: 

A)  ​the quality of treatment that employees receive from a company's internal service providers. 
B)  ​the quality of treatment that employees receive from the customers of a company. 
C)  ​the quality of treatment that customers receive from the employees providing services. 
D)  ​the quality of treatment that customers receive from a company as compared to its competitors.