Pretty sure it pertains to NATO in the context of: ''you attack one of us, you attak us all.'' Meaning that if one country in NATO is attacked or threatened you attack or threaten all the countries in NATO
hope this was useful
The answer might be a. depending on the place
-women weren't staying at home all day
-separates the family
-it allowed women to make their own money
Constantine moved it because Rome was getting invaded by the barbarians