Help me please i dont know

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

Brainliestttme : ) what demographic changes occurred after world war ii?

What types of subjects did public high schools in the 1900s emphasize and why