Which of the following statements accurately describes the interquartile range (IQR) of Company A and Company B's monthly sales?
a) The IQR of Company A is larger than the IQR of Company B.
b) The IQR of Company B is larger than the IQR of Company A.
c) Both Company A and Company B have the same IQR.
d) The variability of the companies cannot be determined from box plots.