[单选题]
A mass oscillates on the e 4aapd- 4;jmyrn n(p rpxg6ik-nvs0,-;nmo rp fw ztc6h8h4;) td of a spring, both on Earth and on the Moon. Where is t6 w-v,tn;ptmo k rc;-ih rn(60 s hpfx)z84pgnhe period the greatest?
A. Earth
B. the Moon
C. same on both Earth and the Moon
D. cannot be determined from the information given
