[单选题]
What is the length of the shortest pip5lh;uv6rs6q/bnmd ) b e closed on one end t:pl5gs lav)qu6xd* 8 chat will have a funda8 :5 6xc *qsludvlgap)mental frequency 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. $4.12 \; m$
