Historians add to our knowledge of history in the following ways:
a. interpret and evaluate history
c. verify the authenticity of historical data
b. research historical data
d. all of the above

Historians add to our knowledge of history in the following ways:

1. Interpret and evaluate history

2. Verify the authenticity of historical data

3. Research historical data

sorry dude nope this isnt even the right subject

answer; direct observation;