Super Fast food has less wait time beacuse it has a smaller median. Hence, option C is correct.
Determining the drive through which has a less wait time would be done by determining the value of the median for each drive through.
The median value is given by the vertical line inbetween the box of the plot.
For Fast chicken:
For Super Fast food :
Since, Super Fast food has a lesser median, then it has a less wait time.