NO.PZ2022120701000081
问题如下：
What is an advantage of a multi-factor model over a smart beta or beta plus strategy for ESG integration in portfolios?
选项：
A.Lower cost
B.Diversification
C.Risk mitigation
解释：
One of the advantages of a multi-factor model over a smart beta or beta plus strategy is diversification Smart beta and beta plus investment strategies represent the compromise between passive, index-oriented investment and active investing at a lower cost than a traditional actively-managed strategy The active element within these strategies generally emphasizes a single or dominant investment factor, such as value, quality, growth, or momentum A multi-factor strategy, on the other hand, seeks to maximize the benefits of diversification through the combination of a number of different factors老师请解释一下C选项，考虑的因子越多 不应该风险越低吗？
