A mixed economic system is a system that combines aspects of both capitalism and socialism. A mixed economic system protects private property and allows a level of economic freedom in the use of capital, but also allows for governments to interfere in economic activities in order to achieve social aims.
The answer is "A" : The national focus shifted from domestic affairs to foreign policy concerns
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The Tet offensive altered public opinion of the war because the "<span>(B) U.S. suffered heavy losses". Although it ended with a US and South Vietnamese victory, many Americans grew wary of the costs. </span>