Answer:
B Seek collective action against North Korea through the United Nations
Step-by-step explanation:
In 1950, the American military intervention in Korea was launched under the banner of the United Nations, thanks to a resolution passed by the body´s Security Council. Although all Security Council resolutions are passed with the "yes" vote of all five permanent members - USA, Russia, France, Britain and China - , the day of the crucial vote on Korea the Soviet ambassador was absent in the council, so his vote did not count either as a "yes" or as "no", but as it was not negative, the resolution passed.