Does somebody know this answer to the Commonlit Barack Obama Nobel lecture

D. He thinks that "just wars" are likely to bring about lasting peace, even though they create some suffering.

Explanation:

During Barack Obama's speech on his receipt of the Nobel Peace Prize, he made his stance on the need of just wars in bringing lasting peace.

In his speech, he said: "There will be times when nations -- acting individually or in concert -- will find the use of force not only necessary but morally justified".

He believes that the quest for peace entails sacrifice and demands responsibility. He believes that NATO is indispensable and needed in times peacekeeping. He believes that those who go for peacekeeping are not wagers of war but wagers of peace. Obama believes that war itself brings suffering but it should be carried out by observing certain rules of conduct. Also, alternatives to violence like the stop of nuclear weapons should be enacted.