[单选题]
A new car manufacturer adv6w1.a z*zy)qb9x0z fch +h tiqs cht(0ejemh.cgg rl/l 4(:bsu:+q en6rtises that their car can go "from zero to sixty in 8 s". T lesmjubr. n( hq4g e:cl:/g6+his is a description of
A. average speed.
B. instantaneous speed.
C. average acceleration.
D. instantaneous acceleration.
