[单选题]
The pendulum of a grg ngp(6vr0 qe6aaf jrustj7 9y 2ta.;c;ndfather clock is 1.0 m long. What is its period on the Moon where the acceleration due to gravity .j9yarstf2 ct ;a u;7jis only $1.7 \; m/s^2$?
A. $1.2 \; s$
B. $2.4 \; s$
C. $4.8 \; s$
D. $23 \; s$
