Answer:
success in conquering England.
Explanation:
The only option that is not generally a reason why historians study societal change would be "<span>d. to estimate how long it would take to build a road system," since this requires a separate type of research. </span>
The methods that have resulted in the greatest contribution to global security were: <span>military they pledged for the common defense and the stronger and bigger the were the better protection.
Unlike in the past, the greatest military in Modern Era is not possessed by the countries that have the most soldiers, but by those who possessed the most advanced mass destroying weapons.</span>
I would say that the answer would be that Christianity is legal to practice. Check out the Great Controversy for more information.