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To make sure they werent smuggling goods<span />
Answer:
Population growth and diversity.
Explanation:
In an area with multiple enthic groups and people, socilization and growth leads to others exploring new cultures and learning about them and sharing them. This could also lead to new cultures being forged from two original cultures.
The Cuban Missile Crisis began on October 16, 1962, was a direct and dangerous confrontation between the United States.
Communal living would be a society where everyone lived in the same community and shared everything. So the answer is A.