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In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power

The sahel is located on the edge of the sahara desert. a. north b. west c. south d. east

Before the civil war, the south’s economy was based on enslaved labor. large cities. immigrant workers. factories.