The main reason why the Roman government began the "bread and circuses" program is because the Roman Republic had just transformed into an empire and they didn't want any revolts from the populous, so they wanted to keep everyone happy and entertained.
The European balance of power broke down was an effect following German unification is correct answer due to fact that Germany (except Austria) was united by militarist state of Prussia with powerful army which definitely change balance on the European scene especially that formal unification took place just after end of Franco-Prussian war which humiliated France.
Control of government spendings
Removal of barriers to trade goods and services
liberalization of financial flows simultaneously with institutional change
Labor reform
Economic competition reform
financial reform.
etc
hope this helps
Answer: A historian studies each of the major world powers between the years 100 BCE and 100 CE
Explanation: your Brain