[单选题]
A new car manufactureyb .gm 6qbs;k zan*te:yj*q- +8o- w4ivp8rrv* u0mdjr advertises that their car can go "from zero to sixty in 8 s". This is a descriptiond80wi p ujvrv8orm*4- of
A. average speed.
B. instantaneous speed.
C. average acceleration.
D. instantaneous acceleration.
