The correct answer is the first one: with the Protestant Reformation half of Europe was protestant and half catholic, and this lead to a decline in religious unity.
It also lead to the opposite of the other points: it led to religious wars and decreased power of the catholic church.
The standard is still important (arguably even more important compared to past situation) because due to the development of social media, the flow of information became extremely easy to consume.
Even though this might good for average people, we cannot deny the fact that this could also make it easier for someone who want to intentionally spread misinformation.
Because they are different tribes and different country
