8. Tommy Thomas's tankard holds $480 \mathrm{ml}$ when it is one quarter empty. How much does it hold when it is one quarter full?
A $120 \mathrm{ml}$
B $160 \mathrm{ml}$
C $240 \mathrm{ml}$
D $960 \mathrm{ml}$
E $1440 \mathrm{ml}$