All of the following are examples of a primary source except a. a history textbook b. an eyewitness account of an event c. the united states constitution d. a recording of a speech

A primary source is an original source or evidence that was created over a time of study. This means that the answer would be B. an eyewitness account of an event because the witness hasn't undergone through studies of events.

d is what im going with

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

answer; /// i believe the three where,tutankhamun,hatshepsut and , im not sure,but maybe (ramses the great)