This box plot shows the weights in ounces, of some kittens.

Weights of Kittens
4 5 6 7 8 9 10 11 12 13
Ounces

Which of the following is the interquartile range of the weights, in ounces of the kittens?

O A. 0.5
O B. 2.5
O C. 3.5
O D. 7.5