The box plots below show student grades on the most recent exam compared to overall grades in the class:

which of the following best describes the information about the medians?
a. the exam outlier at 60 makes the iqr narrower and the median higher.
b. the class data is more evenly spread, which pulls its median down.
c. the class median is lower than the exam median.
d. the class q3 is higher than the exam q3.