[单选题]
If the voltage acrossrlxkv7). k *xh a circuh )g a+9kdy0iwkvoa;5 g1y s/yit of constant resistance is doubled, the power dissipated by th w+yy/hkgyisv 0) g 9ad5aok;1at circuit will
A. quadruple.
B. double.
C. decrease to one half.
D. decrease to one fourth.
