A Sample Was Taken of the Metabolic Rates of Men

Multiple Choice

A sample was taken of the metabolic rates of men participating in a study regarding diets. The following boxplot depicts these rates (measured in kilocalories per 24 hours) .
Which of the following statements would be true if each person in this data set increased his rate by 120 kilocalories per 24 hours?

A) The median would increase by 120.
B) The first quartile would decrease by 60.
C) The third quartile would increase by 60.
D) The interquartile range would increase by 120.