What steps should be taken to determine the authenticity of a primary source

From 1000-1500 a. d., how did cities like cairo change

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^^

Which best describes the characteristics of lynchings in the south from 1880 to 1910? a. the number of lynchings in the south increased b. the number of lynchings in the south decreased. c. the number of lynchings in the south stayed the same. od. the number of lynchings in the south equaled the number in the north