[单选题]
An object is thrown upwt2ra9gj5+prl ; hb(zpajp3b *m/o3ofh yeh h+3rd with a speed of 15 m/s on the surface of planet X where the acceleration due to gb m/+hyje3o3 ohf*h3p ravity is $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?
A. $6.0 \; s$
B. $8.0 \; s$
C. $10 \; s$
D. $12 \; s$
