Explanation:

• Hindsight bias (A) is a cognitive error, which can often be corrected or eliminated through better information, education, and advice. It refers to the tendency to view past events as having been predictable.

• Loss-aversion bias (B) is an emotional bias, making it more difficult to correct. Emotional biases stem from impulses and intuitions, and while they can be recognized, they are harder to mitigate. Loss-aversion bias describes the preference for avoiding losses over achieving gains.

• Representativeness bias (C) is also a cognitive error, similar to hindsight bias, and can often be addressed through improved information and education. It involves classifying new information based on past experiences.

Conclusion: Emotional biases, such as loss-aversion bias, are inherently harder to correct compared to cognitive errors, making B the correct answer.