requirement is $25\%.$ The $BB$ share continues to trade at $$100$ while the share price of AA decreases. At which price will the hedge fund be forced to reduce its positions?

a$.$ $$75\mathrm{.}0$

b$.$ $$80\mathrm{.}0$

c$.$ $$33\mathrm{.}3$

d$.$ $$66\mathrm{.}7$

e$.$ $$0\mathrm{.}0$

f$.$ $$50\mathrm{.}0$