Answer: Sometimes, a moderately adverse scenario from the past is made more extreme by multiplying the movements in all risk factors by a certain amount. However, this approach assumes there is a simple linear relationship between the movements in risk factors. This is not necessarily the case, however, because correlations between risk factors tend to increase as economic conditions become more stressed.

**Explanation:** B is correct because it accurately describes the limitation of scaling historical scenarios by multiplying risk factor movements. This approach assumes linear relationships between risk factors, which is problematic because correlations between risk factors typically increase during stressed economic conditions, making the linear scaling approach potentially misleading. - **A is incorrect** because it describes a valid approach to scenario building (considering forward-looking scenarios that haven't necessarily occurred in the past), but this is not the limitation being discussed. - **C is incorrect** because it describes valid short-horizon historical stress tests, which are different from the scaling approach limitation. - **D is incorrect** because it discusses the importance of senior management involvement in stress testing, which is a valid point but unrelated to the specific limitation of linear scaling of historical scenarios.

Author: LeetQuiz Editorial Team