[单选题]
When the first law of n ieaj18rh .c0q;zr )ctherce *)/d83rsk8 kt gq )jnkt39 *vailfmmodynamics, $Q = \Delta U + W$, is applied to an ideal gas that is taken through an isochoric process,
A. $\Delta U = 0$
B. $W = 0$
C. $Q = 0$
D. none of the above