Why, According to Abbate, Is a Soldier Obligated to Assume

Why, according to Abbate, is a soldier obligated to assume extra risks to protect civilians from his or her own country?

A) Because the principle of risk requires a soldier to assume extra risks to protect all civilians, including those from his or her own country.
B) Because soldiers have a special obligation to their co-nationals to avoid directly harming them.
C) Because soldiers have a role-based obligation to protect the people from their country.
D) Because the principles of jus in bello require soldiers to discriminate between combatants and noncombatants.