What are three common elements amongst the declaration of independence and the declaration of the rights of man and of the citizen

Germany was unified as a result of a series of wars. which ofthe following wars was the last and resulted in the formation ofthe german empire? austro-prussian warbfranco-prussian wardanish war

Before world war 1 started, austria-hungry was wary of (spain or serbia) because of border disputes

What is significant about official languages in russian republics? why would it matter?