It would be C. Erasmus, hope this helped :)
A. Part of the Executive Office of the President
To avoid bias, the historian must not rely on hearsays or opinions from different people because the facts could be misguided. He has to see the actual thing and create a neutral perspective focusing only on what is obvious. Therefore, the answer is letter A.
The change in women's roles was caused by their affection/what they did during the war. The decision of women's right to vote was made.
