Which of the Following Best Explains 'Turnkey Outsourcing

Which of the following best explains 'turnkey outsourcing'? 

A)  Responsibility for the coordination of the entire outsourced function lies internally. 
B)  Responsibility for the coordination of part of the outsourced function lies with the external provider. 
C)  Responsibility for the coordination of the entire outsourced function lies with the external provider. 
D)  Responsibility for a small part of the outsourced function lies with the external provider.