Final answer:
a) An indicator of quality. Price is often used as an indicator of quality, but it is not always reliable. Consumers should also consider other aspects such as materials, craftsmanship, and personal comfort preferences. Size is not typically associated with the price of a sofa.
Step-by-step explanation:
When individuals are faced with buying decisions, especially when they lack expert knowledge about a product or service, they may use price as a heuristic for quality. This correlation between price and perceived quality suggests that the more expensive a sofa, the higher its expected quality. While this may hold true in some cases, it is not a foolproof method. Price can be influenced by a variety of factors such as brand reputation, marketing, and retailer margins, which do not necessarily reflect the intrinsic quality of a sofa.
Using price as a) an indicator of quality can sometimes lead consumers to make more informed decisions, as they surmise that higher-priced items have better materials or craftsmanship. As for b) the primary factor for comfort, this is more subjective and can vary greatly depending on personal preferences and physical needs. For c) a measure of durability, higher prices can be associated with better durability only if the materials and construction methods used justify the cost. Lastly, d) a determinant of size is not directly related to price, as the size of a sofa is independent of its cost.
Overall, while price can sometimes be a reflection of quality, it's important for consumers to investigate further and consider other factors that contribute to the true value of a sofa beyond its price tag.