I dont know if this is correct but i would say c.
<span>d. a person running 100 m straight across a field at a constant speed
</span>Which of the following has no acceleration?
a person running 100 m straight across a field at a constant speed
NOT:
a. a satellite orbiting at a constant speed
b. a person running once around a track at a constant speed
c. a car making a turn at a constant speed
what is this even supposed to be