Can someone please answer this quick i have no idea how this app works but I need a quick answer

Which of these best estimates the standard deviation of points in a card game ?

(I’m bout to write the dot plot down)

490(1 dot) 495(2 dots) 500(4 dots) 505(2 dots) 510(1 dot)


A. 5 points
B. 20 points
C. 50 points
D. 500 points