Final answer:
Consumers buy products based on cost, quality, availability, maintainability, and reputation, particularly influenced by their belief in the satisfaction they expect from the purchase. Hence, all the options are correct.
Step-by-step explanation:
Consumers make purchasing decisions based on a combination of factors that include cost, quality, availability, maintainability, and reputation. These factors are crucial because every purchase is underpinned by a belief about the satisfaction that the product or service will offer, largely derived from the information available.
A firm's reputation especially plays a significant role, as it can determine the consumer's expectation of quality. Moreover, a strong reputation can justify higher prices, as seen in the example of a well-established grocery store versus a temporary stand at a farmer's market. Therefore, choosing one option cannot be considered as all the given options contribute to the purchase by a consumer.