I think the answer will be A
Only one firm selling all products in the market.
The absence of the substitutes of these suppliers.
The policy of unique product, i.e., absence of substitute the product sold by one firm,
Barriers to the entry and exit to the markets in terms of government, franchise, patents, copyrights, ownership.
Control of complete information e.g. secret formula.
This probably isn't the answer you are looking for, but they bathed more than the common people of their era and slightly less than people of today.
Hope this helps even a little.
Är detta en fråga eller säger du det bara
