Typically, the first step in process simulation is to $\_\_\_\_\_\_\_\_.$

A$.$

run samples from the probability distributions of the input variables that drive the flow of entities

B$.$

identify the resources that are needed to perform process tasks

C$.$

create a graphical flowchart that describes all process steps and logical decisions that route entities to different locations

D$.$

enter key inputs such as how long it takes to perform each step of the process