[单选题]
An object is moving in a straight line with constant af3 c,q-t9u 9)eqb bpzy ywfh9-a 4)mfxcceleration.y/noe5mf,x *o+:h l-td *fh7x ylwiv6 Initially it is traveling at 16 m/s. Three seconds later it is traveling ono6,f+ exl:f5ymh d-*yx *wi 7tl/ vhat 10 m/s. How far does it move during this time?
A. $30 \; m$
B. $39 \; m$
C. $48 \; m$
D. $57 \; m$