C选项怎么理解？谢谢！

问题如下：

Emerald believes there are significant benefits to incorporating behavioral finance as part of their client assessment process and has recently made changes to this effect.

Benefits of the recent changes to Emerald's client assessment process least likely include:

选项：

A.

closer adherence to client expectations

B.

reducing portfolio risk

C.

improving Emerald's client retention metrics

解释：

Incorporating behavioral finance does not have a direct impact on portfolio risk. In some cases, this approach will help encourage a reduction in portfolio risk, but it may also help other clients to take on more risk as appropriate. Investing as the client expects and improvements to client retention metrics are both benefits of incorporating behavioral finance.