[单选题]
A car goes from 40 m/s to 80 m/s in ons:sy ztzn;:g -b9-na distance of 200 m. What is i *fu9i vu;2p xs*ze0a16wdy(2hqu; krk +kftgts average accele2 ** 9v xd; aerk( tgkfskiuhqufzy+up2;6w1 0ration?
A. $8.0 \; m/s^2$
B. $9.6 \; m/s^2$
C. $12 \; m/s^2$
D. $24 \; m/s^2$
