Which of the Following Would NOT Be an Expenditure on a Final

Multiple Choice

Which of the following would NOT be an expenditure on a final good or service?  

A)  a medical clinic's purchase of flu vaccines 
B)  a factory's purchase of a spot welding machine 
C)  a customer's purchase of a cup of coffee at a restaurant 
D)  a college student's purchase of a textbook for a medieval history class