Choose the statement regarding the correlation coefficient that is NOT correct.

A$)$

Perfectly negatively correlated assets have a correlation coefficient of $1\mathrm{.}0.$

B$)$

Perfectly positively correlated assets have a correlation coefficient of $+1\mathrm{.}0.$

C$)$

A correlation coefficient of $0\mathrm{.}0$ means there is no relationship between the returns of the assets.

D$)$

Combining assets with less than perfect positive correlation will not reduce the total risk of the portfolio.