Assume a university is trying to analyze its costs for a possible new program. For each of the following situations, indicate if the cost is fixed, variable, step or semi-variable with regard to the number of students:

A. The university prints an ID card for each student. There is a cost for each card made.

B. The university has a library building. The library building is depreciated over a life of 40 years.

C. The university believes it needs to hire one faculty member for every 15 students it admits.

D. The university pays its president $1,000,000 per year under a long-term contract.