Which Of These Physical Settings Make Sense For The Object, whose Position Is Given By A(T)=3cos(t) ?

a. An ant walking at a steady pace from the tip of a propeller toward the hub

b. None of these

c. The shadow cast by a rock that's stuck on the edge of the spinning wheel

d. A car driving from San Diego to Los Angeles

e. A skydiver falling from a plane, before she opens her parachute