Historian interviews two people who fought during a certain battle during the gulf war. one person says u. s. forces fired first; the other person says iraqi forces fired first. to try to learn what really happened, the historian should:

If both parties involved are blaming the other for the start of the battle, the historian should try to get the statement of a 3rd party witness, preferably one that is impartial and a first-hand witness. This makes the 3rd party witness more credible. This also avoids any self-serving motives of the the US and Iraqi forces.

To be honest i thinks its between the first answer and the third answer