[单选题]
The pendulum of a gra1v: rrmpl:pl6ndfather clock is 1.fs qg/tc uf:yjxvx8id,ovc1 +*7th*+ 0 m long. What is its period on the Moon where the 8f,iu1+qsfchyt+td*:ocxv x/ 7vg j* acceleration due to gravity is only $1.7 \; m/s^2$?
A. $1.2 \; s$
B. $2.4 \; s$
C. $4.8 \; s$
D. $23 \; s$
