Final answer:
Freedom in the market economy can be transgressed when consumers are misled, when products are harmful, or when other listed conditions apply. The best answer to the given question, pointing to scenarios where freedom can be justifiably limited, is 'All of the above' (d), which encompasses both misleading practices and unhealthy products.
Step-by-step explanation:
The requirement for freedom can be transgressed in cases which lead to market failure. When considering the given options for when freedom may be transgressed, option a), c), and d) are all scenarios where consumers could be negatively affected due to imperfect market conditions. Specifically:
Consumers do not get what they think they are getting, typically due to information asymmetry.
A product is unhealthful for consumers, which could lead to externalities adversely impacting public health.
All of the above options, since each represents a potential challenge to consumer welfare and could justify intervention in a market economy.
None of the cases specifically mentions non-competitive pricing as a sole reason for intervention without additional context or market failures. Therefore, the correct answer is d) All of the