老师，公示看不懂

问题如下：

Tim, an analyst of an investment company forecasts the return and deviation of below securities. Based on these information, which statement is most correct:

选项：

A.

Security A has the highest beta value.

B.

Security B has the highest beta value.

C.

Security C has the highest beta value.

解释：

C is correct.

The beta value of security A is$=\frac{{\rho }_{Am}{\delta }_A}{{\delta }_m}=$1.4

The beta value of security B is ${\displaystyle }$$=\frac{{\rho }_{Bm}{\delta }_B}{{\delta }_m}=$1.33

The beta value of security C is$=\frac{{\rho }_{Cm}{\delta }_C}{{\delta }_m}=$1.5

Security C has the highest beta value.