<span>the father of psychoanalysis</span>
Answer:
The answer is C) Customs and traditions.
The war in the eastern and western front was the same in the sense that both fronts used similar or even the same tactics as at the time of the war, this was the only way how war was being done. On both fronts, there were immense artilery shellings going on together with huge loss of life. However, in the eastern front, one has to add the horrible conditions - extreme cold, rain, winter, etc. to this.
The argument he used was that because he had lived in a territory where slavery was illegal, he could never again be enslaved. This was a doctrine that was recognized in common law for centuries in Europe.