[单选题]
An object is moving in a s:wq1oy g)3 rv o3:nrb .ie6tubtraight line with constaz5v*7a+oh. ohi e(mka nt acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this *kv5o 7+.( mioazehhatime?
A. $30 \; m$
B. $39 \; m$
C. $48 \; m$
D. $57 \; m$