Which of the following occurrences is the best example of Wiesel's use of foreshadowing in Chapter 22 (60) The selection process where some people are sent immediately to death in the crematorium

Mrs. Schächter's repeated demands that the Jews look at terrible fire that no one can see but her
The crowded train cars that are rolling towards an unknown destination
The young couples who caress each other on the train as if no one else is there