[单选题]
An object is thrown nqe. b*8wxg 3vz1tlh (uv(db:ydg2( u)f:iyzl pward with a speed of 15 m/s on the surface of planet X where the accelerabvd)g ldf2 ::y(z u(iytion due to gravity 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. $12 \; s$
