How Does the Qur'an Answer the Question: Why Is Humanity

How does the Qur'an answer the question: Why is humanity prone to war?

A) Although we are born innocent, free of sin, we are prone to war as a result of the corrupting influences of society.
B) Peace is attainable only when human beings surrender to God and live in accord with God's will; since there are people who have not submitted to God, there is war.
C) Individual drive for power, wealth, prestige, and all other desires for self-aggrandizement lead to strife.
D) All of the above