Which best describes the impact of gelissen’s first-person account of her experiences in rena's promise: two sisters in auschwitz?

Gelissen describes in this account the constant struggle for survival in the camp. She soon learns there were no guarantees. Rena's motivation came strongly from a promise to her parents to keep her younger sister, Danka, safe. Her account describes the relentless specter of death while at the same time showing how prisoners would risk their lives to smuggle medicine, clothes, and food to other prisoners. Because Rena was an early prisoner in Auschwitz, she describes some of the confusion at the beginning and the realization of what was really happening to the Jewish people. Helpful features of the book include historical notes and a section describing the fate of the people the sisters knew. This memoir captures the horror of Auschwitz in a clear way that helps the reader understand the atrocities perpetrated there.