An investor currently holds the following portfolio:

The investor is worried that the Beta of his portfolio is too high, so he wants to sell some

stock C and add Stock D$,$ which has a Beta of $1\mathrm{.}0,$ to his portfolio. If the investor wants his

portfolio to have a beta of $1\mathrm{.}72,$ how much stock $C$ must he replace with stock $D?$

$$36,000$

$$31,000$

$$24,000$

$$18,000$