[单选题]
When the first law of therm)kldi *jf(noq.s4o4 /wm5 xshoir6 8uo *i; 7t/r elxin;qwj/opwon3*dynamics, $Q = \Delta U + W$, is applied to an ideal gas that is taken through an isobaric process,
A. $\Delta U = 0$
B. $W = 0$
C. $Q = 0$
D. none of the above
