I dont,think that there was a decree
I don't think the 10 Amendments were passed by one person specifically, it was more by Congress in general.
It would be the term "monopoly" that <span>refers to an economic situation where only one company makes a product and is therefore able to fix the selling price, which is why such firms are often illegal in the United States. </span>
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.