[单选题]
An object is thrown upward with a speed of 15:fdxyh k)i7g+ heke3( m/s on thapjfn.gdg/a:e1 )eo1e surface of planet X where the acceleration due to gravi.nda)gf:1g o1ej ae/pty 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. $12 \; s$
