[单选题]
If the pressure actinvog 4kb 3gdft ,bzn:0)0mm mop 3qu16h vns4,qg on an ideal gas at constant temperature is tripled, its volumvupm m413h n60qo qs,me is
A. reduced to one-third.
B. increased by a factor of three.
C. increased by a factor of two.
D. reduced to one-half.
