Answer:
Correct answer is d. government and laws.
Step-by-step explanation:
Option d is correct because Roman system influenced many modern democracies. For example, American political system known as representative democracy was influenced by Roman Republic.
A is not correct as military technologies changed a lot since that period.
The same goes with religion, as Romans were mostly polytheistic.
Economy has changed a lot since that period, therefore C is also not correct.