A study was done by an online retail store to determine the rate at which users used its website. A graph of the data that was collected is shown:

A. The range represents the 54 month time period of the study.

B. The range represents the 36 month time period of the study.

C. The range represents the number of users each month for 36 months.

D. The range represents the number of users each month for 54 months.