Suppose that each of the N= 4,200 registered students lived in one of the 20 campus dormitories. Each dormitory accommodates 210 students. It is college policy to fully integrate students by gender and class designation in each dormitory. If the registrar is able to compile a listing of all students by dormitory, what type of sample should you take? A. A simple random sample

B. A cluster sample

C. A stratified sample

D. A systematic sample