[单选题]
If the pressure acting on an i;dktm9 eqb/b 4deal gas at con wd2vhs; 1bq9qkx-c 1jr1lea5 tfmkv( 17by*ustant temperature is tripled, its volubu 1-v*ajmw71x rqcy v f1 tq9;dk2b esh15kl(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.