Q: Fact 1: Loud noises can cause animals to startle. Fact 2: Flat spots on rail car wheels cause a loud banging noise. Given the two facts above, flat spots on rail car wheels can cause what to startle?

Select from:
(A). animals;
(B). water;
(C). planes;
(D). vehicles;
(E). people;
(F). nerves;
(G). deaf people;
(H). an object;
A:
(A).