问题如下：
5. To address his concern regarding the previous adviser’s asset allocation approach, Raye should assess the Laws’ portfolio using:
选项：
A. a homogeneous and mutually exclusive asset class–based risk analysis.
B. a multifactor risk model to control systematic risk factors in asset allocation.
C. an asset class–based asset allocation approach to construct a diversified portfolio.
解释：
B is correct.
Raye believes the Laws’ previous financial adviser followed an asset allocation approach that resulted in an overlap in risk factors among asset classes. A multifactor risk model approach can be used to address potential risk factor overlaps. Risk factor approaches to asset allocation focus on assigning investments to the investor’s desired exposures to specified risk factors. These methods are premised on the observation that asset classes often exhibit some overlaps in sources of risk.
文章讲了之前的基金经理也是用overlap风险因子呀，没有说是用asset class approach，已经overlap风险因子了，还需要用多因素风险因子吗？