Selling baked goods out of your home or apartment is illegal in Wisconsin and New Jersey. In these states, baked goods must be prepared in commercial kitchens that are subject to state inspection if they are to be sold to the public. For home bakers in these two states, the barrier to entry they face is
a. Self-imposed.
b. Due to economies of scale.
c. Government imposed.
d. Due to ownership of a key resource.