???? Do u even want an answer or nah
The need for a government with a stable set of rules and protection of individual rights.
Because they don't have to go into enemy lines, which requires mental training and physical, as well. They just see the invading troops, and attack, rather than planning and attacking.
I believe the answer is: D)report on and bust unions.
The pinkertons were independent detective agencies that could be hired with a high price to conduct a private investigation to anybody. At that time, many companies used their service to investigate which of their workers secretly belong in the union and fire them.