[单选题]
A new car manufacturer advert. -9:eh.angt0ebp eb f+qh-bvises that theirn9sfu+y:qsf lk +g;+vo .dg0f car can go "from zero to sixty in 8 s". This 0ny9u+o qfdkg+f g. vsfls:+; is a description of
A. average speed.
B. instantaneous speed.
C. average acceleration.
D. instantaneous acceleration.
