The answer to that is C. sending Romans overseas as soldiers left fewer farmers near Rome and led to severe food shortages.
I believe the answer you are looking for is: "a violent or destructive protest." The government would be most likely to become involved in a union protest that is violent or destructive.
The Carbonari (charcoal burners) were groups of secret revolutionary societies founded in early 19th-century Italy. The Italian Carbonari may have further influenced other revolutionary groups in Spain, France, Portugal and possibly Russia
