How many presidents are there?

Which of the following statements is true about the treaty of versailles ?

How did thomas hobbes’s interpretation of the social contract differ from john locke’s?

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.