[单选题]
What is the length of the shortest pipe closed on z(r 7:-izfeshg;dny 5 one end that wilcd glgaunuw16; ;;/m fl have a fundamental frequency ;al fndm1;uug/gwc6 ;of 60 Hz on a day when the velocity of sound is 340 m/s?
A. $1.24 \; m$
B. $1.42 \; m$
C. $2.14 \; m$
D. $4.12 \; m$
