Answer:
b. in steady state
Step-by-step explanation:
As we know that the simulation model should be applied at the time when the number of samples with respect to the customers should be tested. Also it considered for the decision making purpose that shows the average no of customers that instantly increased from the 0 unit in the case when the level is off and also hold the same value. So here the simulation model should be considered as in the steady rate
Therefore the option b is correct