[单选题]
A new car manufacturer advertises that their car cosod ;h4ede3j n534kcan go "from zero to 1(sl.qs gvl6x yng+y1s o)cwke19+fln wv 7z.sixty in 8s gg ()y1kqy lfv.wxnlo+6 l197ves1wsn+zc. s". This is a description of
A. average speed.
B. instantaneous speed.
C. average acceleration.
D. instantaneous acceleration.
