Answer: A. Burritos Bros
Explanation:
We know that the interquartile range is the difference between the first quartile and the third quartile.
The box starts from the first quartile and end to the third quartile.
From the given box plots , the box plot of Burritos Bros has the smallest box .
i.e. has the smallest interquartile range .
The median (vertical line through box ) of box plot of Burritos Bros is also greater than 75.
Therefore, Burritos Bros is the restaurant which has a median positive mark count above 75 and the smallest interquartile range.