During the World War II the industry and the manufacturing of weapons by the war production plants was a major enterprise and the need for a trained security increased exponentially. The on site security was needed to prevent theft, sabotage and espionage. The security companies even started training their own security staff which was well trained and their training in time was close of that the police got. Some companies even had their own private investigators among their number.

How did enslaved Africans build strong community ties with one another in
the Americas?
Answer:
D. They drew elements from different African cultures to create a new
culture they could all participate in.
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It’s false.
The greatest number of immigrants came from many other places. Like the indians, the spanish, etc
Depending on the time, it could be the Phoenicians ( I think this is the best answer; this is what they're known for best) or later in time, the Romans (but they had colonies also elsewhere).
The Great Awakening, encouraged people to become Christians, and follow God