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Multiple Choice

$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Investiment } A$ $\quad$$\quad$$\quad$$\quad$$\quad$$\text { Investment } B$
$\begin{array}{|l|l|l|l|l|}\hline & \text { Good year } & \text { Bad year } & \text { Good year } & \text { Bad year } \\\hline \text { Probability } & 0.80 & 0.2 & 0.90 & 0.1 \\\hline \text { Pay-off } & 140 & 45 & 110 & 70 \\\hline\end{array}$
-A portfolio comprising two assets can be formed with zero variance,provided the correlation between the securities is:

A) $0$
B) $0.5$
C) $1$
D) $-1$