Which of the following was a key factor in making trade safer and easier across the Roman Empire during the Pax Romana?

The elimination of all provincial taxes

The construction of a vast network of roads

The requirement that all citizens speak Latin

The establishment of a single religion for all territories

What major economic reform during the Augustan Age helped to unify the empire's diverse markets?

The creation of a standardized currency

The abolition of private property

Banning trade with regions outside the empire

Forcing all farmers to grow only wheat