All of the following are examples of primary sources except: a. a united states history textbook b. a journal entry written by the explorer meriwether lewis c. a photograph taken during the battle of gettysburg d. president abraham lincoln's inaugural address

The correct answer is A) A United States History textbook.

A primary source is one that was created at the time of the event(s) being discussed. Based on this information you can see that options B-D were all primary sources, as they were created during the time where the event was actually happening.

On the other hand, the US history textbook was created a long time after many of the events being discussed. This is why the textbook is considered a secondary source.