[单选题]
If the current flowing through a cc+roxp, )8i5y-febu /z m zh6yircuit oc) 8ey 0rv gpgqz,dxvt/.t 0l.f constant resistance is doubled, the power dissipated by tht0 /y xrz8vd..p,q )0legtvgcat circuit will
A. quadruple.
B. double.
C. decrease to one half.
D. decrease to one fourth.
