Which of the following markets has a barrier to entry?
A.
Stan's Garbage Company runs the only trash collection service in town.
B.
Gold can only be mined in certain places in the world.
C.
There are already many fast food restaurants in the City of Buffalo.
D.There are large economies of scale in the production of widgets.
There are large economies of scale in the production of widgets.
D.
There are large economies of scale in the production of widgets.