How do the reader's and Billy's contrasting points of
view affect the text in the landlady?

the answer is:

in the fourth paragraph. ( the paragraph that begins with “on friday of my third ”).

hope it !

line a --> main

line b --> young

line c --> atitude

black citizens were denied access to the same public facilities as whitesun.

marriages between white and nonwhite citizens were forbidden.

nonwhite citizens were required to carry identification papers with them at all times.