The "next-event time advance" procedure does which of the following?
determines which upcoming event will occur first.
advances the time of the simulation to the next event time.
generates a random variable to select the next event which will happen.

Determines which upcoming event will occur first

Explanation:

Next event time advance is a classification falls under the time advances mechanism also formally called discrete event simulation (DES) model. Time advances mechanism is studied under two categories; discrete event simulation (DES) model (next event time) and discrete time simulation (DTS) model (time-step).

Next event time advances: This mechanism calculates the time of events that may occur depending on a list of events. The stimulation clock is located at zero under this approach