143 seats
because 2920 seats/20 sections=143 seats in each section
I think its either A or D
Hope this helps!
I believe that the answer to the question provided above is that the <span>type of display will give them the best picture of her students data is a bar graph.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.