Which of the answer choices lists market structures in order from the highest number of sellers to the lowest?
a. monopoly, monopolistic competition, perfect competition, oligopoly
b. monopoly, oligopoly, monopolistic competition, perfect competition
c. oligopoly, perfect competition, monopoly, monopolistic competition
d. perfect competition, monopolistic competition, oligopoly, monopoly

The correct answer is:  [B]:  " True ".

Note:  From visual inspecton of the graph shown — [Note:  all images attached refer to the same graph.] :
 
→  We can see that when "x = -2"  ;  there is only one value for "y" ;  and then the "line" of the graph stops for any coordinate corresponding to any "x-value" LESS THAN "-2" ; 

 →  and that there are corresponding "y-coordinates" corresponding to any "x-value that is equal to "-2" and "GREAT THAN  "-2" .