A Sample of Children Age 2-5 Years Is Chosen at Random

A sample of children age 2-5 years is chosen at random from an outpatient clinic.  The number of urinary tract infections (UTIs) over a 1-year period is given in the figure below. What was the average number of UTI episodes over 1 year for a child in this sample?

A) Between 0 and 1
B) 1
C) Between 1 and 2
D) 2
E) Between 2 and 3