Answer:
Policing research often reveals what works and what doesn't work in the policing field. The term evidence-based policing is frequently used to describe research that targets, tests, and tracks strategies to help decision-makers deal with policing issues.
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Brutus' vision of republic is outdated. Diversity of opinion is vital for a republic.
It's necessary for a republic to have people who represent all kinds of people in it. Different classes live different lives, and it's hard for a person who belongs to one class to be aware of the needs, manners, interests of people from a different class. For this reason, diversity is a very important part of a republic.
A republic should <em>NOT</em> be made up of a small group of people who think in a similar way. On the contrary, it <em>should</em> be made up of people from different backgrounds, in order to better represent its people.
I think the answer is C. too much power in the central government.
Totalitarianism and authoriatrianism because Totalitarianism is a form of authoriatrianism.
I don't know what "all other" factors could mean - since we don't know what factors have already been mentioned - but I assume that the pay and work conditions would be the same (those could be the "all other" here and the difference is Italy vs Germany/Belgium).
Generally, Italy is not a very likely destination for migrant workers, since it has recently been struggling economically. The payment, working conditions and work stability are likely to be better in Germany or Belgium, so if one can find a job, there, one is more likely to go to Germany or Belgium