[单选题]
An object is moving in as;s: rpb xod9nx84s; lie3+cz straight line with constant acceleration. Initially it;:s slszco e +b94np3r;xidx8c+ 3-0qaw.zl el7e jsb is traveling at 16 m/s. Three seconds later it is t-wzsq7l b +03 elj.caeraveling at 10 m/s. How far does it move during this time?
A. $30 \; m$
B. $39 \; m$
C. $48 \; m$
D. $57 \; m$
