Use the image to answer the question.

A histogram is shown. From left to right, the horizontal axis has numbers from 2 to 38 in increments of 4. The vertical axis is labeled Frequency. From bottom to top, the vertical axis has numbers from 3 to 30 in increments of 3.

Which number is the best estimate of the standard deviation for the distribution shown?
(1 point)
Responses

4
8
16