Raghib Teaches Mathematics at Camford University and Receives $40,000 Per

Multiple Choice

Raghib teaches mathematics at Camford University and receives $40,000 per year.His spouse, Noraini, works as a self-employed computer programmer and charges $40 per hour.Which statement describes Raghib and Noraini's income?  

A)  Raghib's income is personal interest, and Noraini's income is wages. 
B)  Both Raghib and Noraini's incomes are proprietor's income. 
C)  Both Raghib and Noraini's incomes are wages or salary income. 
D)  Raghib's income is a salary, and Noraini's income is a proprietor's income.