The mantle has the most mass
The opinions and prejudice of an author in writing.
I believe that those two elements greatly affect bias in history because we can never be 100% sure of everything that (may have) happened in history (especially farther in the past), so opinion can affect a historian's writings. Also, everyone is prone to some sort of prejudice, so this can also affect history.
B. To aid Eastern European countries. Since they were all war-torn in the 1920-1940, they all agreed that the country that damages the other must pay their debts that they created with war violence.
Answer:The Antarctic Treaty
Explanation: