Connie made a list of sales at her craft booth and then displayed her data in the histogram shown below.

Based on the histogram, which of the following could be Connie's list of sales?

I. 1, 3, 4, 6, 6, 7, 8, 8, 10, 10, 13, 15, 15, 15, 16, 16

II. 1, 4, 4, 5, 5, 5, 5, 6, 10, 11, 15, 15, 16, 16, 16, 20

III. 1, 2, 4, 5, 5, 6, 6, 8, 12, 12, 13, 14, 15, 15, 15, 16