What was the lasting effect of the roman catholic church becoming the official church of the roman empire?

One of the lasting effect of the Roman Catholic Church becoming the official church of the Roman Empire is that the European regions have been dominated by Christianity. Other religions might have penetrated some of the European regions; however, a greater number of the populace are still Christians. 

C. it's a true fact. i know because we are studying about the great depression. so it best illustrates a claim of fact. thx. have a wonderful day!