C large ports that promoted international trade
Albeit this is a basic answer, World War Two was a major catalyst to an increased focus on internationalism. In addition, financial and political interests (most notably for political interests is the Cold War) are both legitimate reasons to why the United States of America has remained as a major part of international affairs.
There were legions of Americans who could not vote, including Native Americans, some immigrants, women and black Americans.
Answer:
Correct answer is B. He legalized Christianity and changed the capital.
Explanation:
Option B is correct because he legalized Christianity with the Edict of Milan in 313 and also created new capital, named Constantinople after him.
A is not correct as he didn't split with Rome, he strengthen the Empire.
C is not correct as he changed the system and ruled as a sole ruler.
D is not correct as he was a part of the council of four, but decided the full authority in the country after defeating Licinius.