How Might Modern Military Service Reduce Racial Prejudice Among Soldiers

How might modern military service reduce racial prejudice among soldiers of various races

A) Modern warfare has specialized roles. Winning the battle may require trusting specialists of another race, thus reducing prejudice.
B) It cannot. Modern warfare has specialized roles, which will increase prejudice if combatants must rely on specialist of another race.
C) Soldiers from one nation will have reduced racial prejudice toward the other nation if defeated in combat by soldiers from that nation.
D) It cannot. Military service has only been shown to increase racial prejudice.