After an Automobile Purchase, There Is a Good Chance That

After an automobile purchase, there is a good chance that buyers will come across some information (better price somewhere; competitor superiority) that will conflict with their purchase. Knowing this, marketers should:

A) call them with additional information to support purchase
B) send them to an information website
C) avoid them, and let their emotions settle down
D) if they call, immediately refund their purchase
E) defend your position; you have done nothing wrong to them