Options are;
A. Use of the military has become infrequent in the past 20 years.
B. The U.S. military has become less powerful than the armed forces
of other nations.
C. Since World War II, conflicts have become more complicated and
less successful.
D. Conflict between military leaders and diplomats has been a
problem
Answer:
C. Since World War II, conflicts have become more complicated and
less successful.
Explanation:
Shortly when the World war 2 was over, the containment policy which was led by United States of America to keep communism under check included increasing the US military bases all over the world.
However, since then, the military conflicts have become much more complicated and way less successful. Also, they have been utilizing a more political form rather than just pure military conflicts such as was seen in the Vietnam war as well as Korean war.
Due to this fact, military interventions being used as a tool of foreign policy since then has proven to be less successful.
Looking at the options, the correct one is Option C
