Suppose That I Want to Make the Generalization That All

Suppose that I want to make the generalization that all Americans who have served in the military are good marksmen.What would be the best way to go about looking for disconfirming instances?

A) Look at soldiers who have been wounded in battle.
B) Look at soldiers who suffer from post-traumatic stress disorder.
C) Look at soldiers who served fewer than four years in the military.
D) Look at soldiers who were prematurely discharged from the military.
E) Look at soldiers who belong to the Veterans of Foreign Wars.