At an elementary school sporting event, students participated in a 400-meter race. the race times for 20 students in each grade were recorded and presented the following box plot.

based on these samples, what generalization can be made?
a.
the first quartile of the race times for 4th grade students is less than the first quartile of the race times for 3rd grade students.
b.
the interquartile range of the race times for 4th grade students is less than the interquartile range of the race times for 3rd grade students.
c.
the median race time for 4th grade students is less than that for 3rd grade students.
d.
the range of race time is larger for 4th grade students than for 3rd grade students.