Final answer:
Direct personal experiences are d. more likely to lead to attitudes that have a strong effect on an individual's behavior due to the personal relevance and detailed knowledge of the situation, as explained by the actor-observer bias.
Step-by-step explanation:
Attitudes formed on the basis of direct personal experience with the object are generally more likely to have a strong effect on behavior. This is because experiences that are personally lived through typically have a significant impact on our beliefs and attitudes, influencing our feelings (affective component), our behaviors (behavioral component), and our knowledge and beliefs about the object (cognitive component). When we have a direct and personal experience with something, our attitudes tend to be grounded in this reality, which makes them more potent and likely to guide our behavior. Furthermore, the actor-observer bias indicates that we have more information about influences on our own behavior, allowing us to attribute our actions to situational factors more accurately than we do for others. On the other hand, we often attribute others' behavior to dispositional or internal factors due to lack of detailed information about their situations, which affects our understanding of their behaviors.