Which scenario shows an internal conflict best?

as a fierce snowstorm threatens their regiment, soldiers must overcome frostbite and starvation to survive.
a soldier must confront her fears in order to her comrades conquer the enemy.
two brothers, fighting for opposite sides in a war, face each other in battle.
a young adult argues with her grandparents about enlisting in the military.

ANSWER: A soldier must confront her fears in order to help her comrades conquer the enemy.

EXPLANATION: The definition of Internal Conflict says that it happens in the character's mind or is a crucial decision making situation. The best example of internal conflict is a soldier's fear to help her comrades conquer the enemy. This is a situation where she needs to decide and conquer her fear. All the other examples given are some or the other type external conflicts. the conflicts may be occurring between two brothers or a grandfather and an adult, but the biggest internal conflict is the conflict within the person.