Why are the “eight words” Elie hears at the start of the chapter so significant?

a
They designate in which direction he must walk when he leaves the train.
b
They explain the horrors that he will experience at Auschwitz.
c
They mark the last moments between Elie and his mother and younger sister.
d
They show him that if he lies about his age, he can live.

c. They mark the last moments between Elie and his mother and younger sister.