[单选题]
A new car manufacturer advecul k ;+ut1:iqrtises that their car v+ a uc6p:;id7s)(l roh o0tjjcan go "from zero to sixty in 8 s". This is a despi7 u +vsajch: t;)rdo6o0j(l cription of
A. average speed.
B. instantaneous speed.
C. average acceleration.
D. instantaneous acceleration.
