The nuclear war is important for Wiesel because remembering what happened in history can help us prevent the nuclear war in the future. If we forget the monstrosities that were committed we will easily just commit them again without thinking, so remembrance is good.
Any material that possesses physical properties is called a substance. The word also refers to the gist or main idea of something. ... To be thought of as a "person of substance" is a good thing, but to be thought of as a "substance abuser" is not so good.
The answer is option A I think
Majorly just explain how much that would change specific outcomes and the base of his purposes in life/work and such. his iq and experiment were huge impacts in his life, successfulness/happiness etc