A................................................
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.
Answer:
That would be the 26th amendment
Explanation:
The answer would be A, tax on all printed materials :)
the contact of business people with foreign cultures I am confirming this after getting it right.