The Correlation Coefficient Is Equal to
A) $\frac{\operatorname{cov}(\tilde{a}, \tilde{b})}{\sigma_{a} \sigma_{b}}$

The correlation coefficient is equal to

A)
$\frac{\operatorname{cov}(\tilde{a}, \tilde{b}) }{\sigma_{a} \sigma_{b}}$
B)
$\operatorname{cov}(\tilde{a}, \tilde{b}) \sigma_{a} \sigma_{b}$
C)
$\frac{\operatorname{cov}(\tilde{a}, \tilde{b}) \sigma_{a}}{\sigma_{b}}$
D)
$1-\left[\frac{\operatorname{cov}(\tilde{a}, \tilde{b}) }{\sigma_{a} \sigma_{b}}\right]$