Which of the following is least likely to be true of a trace-driven simulation model?

a. It produces more accurate results than a simulation based on a probabilistic workload model

b. It is more costly to construct and run than a probabilistic model

c. It is less accurate when sensitivity analyses involving major modifications to the workload or system structure are carried out

d. Compared with a probabilistic workload model, it is more difficult to preserve correlations between resource requests