The individual characteristic which doesn't influence the behavior of a consumer is the task definition which is considered to be part of a consumer's ability.
Option C is the correct answer.
Consumer behavior is a method of studying the activities of individuals, firms, or other groups. The activities can be related to the purchase or disposal of any product or service.
All the provided characteristics of an individual influence the consumer behavior but a task is not a characteristic rather it's an assignment of any work or job which is allowed to be done by the consumer. The task can be of anything whether to buy or to consume the goods or services by a consumer.
Therefore, the task definition is the ability of an individual and not its characteristic.
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