Notices the people on the train staring at her
Explanation:
The question wants an example of people being rude to those they don't know.
nothing says unkindly like-
"the throngs of staring palefaces disturbed and troubled us"
"stopped their haste and scrutinized the children of absent mothers"
"riveted their glassy blue eyes upon us"
"I sank deep into the corner of my seat, for I resented being watched"
"children who were no larger than I hung themselves upon the backs of their seats, with their bold white faces toward me"
it goes on & on. The entire middle of the passage is dedicated to racial discrimination