Which aspect of the Roman Catholic Church established in the 300s remains today?

The Roman Catholic Church’s leader is still the bishop of Rome, or the pope.
The Roman Catholic Church remains the official church of the city of Rome.
The Roman Catholic Church remains the only official church.
The Roman Catholic Church’s power structure remains unchanged.

the hollywood film industry of 1950 was threatened on several different fronts. television broadcasting was rapidly becoming the dominant entertainment medium in the united states. the paramount anti-trust consent decree requiring separate ownership for production companies and theater chains had gone into effect on 1 january 1950. large numbers of young men and women were marrying, having children, and moving to the suburbs, which affected the viability of downtown first-run movie theaters. foreign revenues were endangered by protectionist tactics including quota systems, high taxes, and blocked funds. finally, the morality and patriotism of hollywood films and filmmakers were under attack from government, religious, and citizens' groups.

explanation:

1.d 2.a c.!