Answer is Option C: Since World War II, conflicts have become more complicated and less successful.
Explanation:
According to the containment policy by USA communism would be kept at bay and to do this there was an increase of US military bases throughout the world.
But military conflicts became more complicated than before.They are more political now. Example of such wars is Korean and Vietnam war. Also, as we see in today's world, the war on terror in middle east and Africa is still going on. So, military interventions as part of foreign policy `are proving to be less successful.
