Which of the following factors is least likely to impact consumer decision-making?

The age of the consumer is typically seen as a more stable factor in decision-making compared to the other listed options. While age can influence preferences, it does not change as rapidly as external influences, personal preferences, or brand reputation. Consumer decisions are often swayed by external environments, such as cultural trends or economic conditions, which can fluctuate and impact purchasing behavior. Moreover, personal preferences are highly individual and can shift based on experiences or exposure to new information. Brand reputation also plays a significant role as it can greatly influence consumer trust and attitudes toward a product.

In contrast, age is generally fixed and serves more as a demographic characteristic that can influence behavior in a broader context rather than driving specific purchasing decisions. Thus, while age may have some effect, it is less dynamic and less influential in the immediate decision-making process compared to the other factors mentioned.