I need the answers for these three questions :))

Which factor has played the most important role in changing the way history is studied over time?

Which of the following was a characteristic of government proposed by the new jersey plan? it denied congress the ability to levy taxes. it based representation on population rather than keeping states equal regardless of size. it denied congress the ability to regulate trade. it preserved an executive committee rather than adopting a singular president.

Most criminologists agree that juvenile crime is less violent today than it was in the early 1990s. according to the text the reasons cited for this decline include what?