“ If you had a million years to do it in, you couldn’t rub out half the you signs in the world. It’s impossible” what does this quote mean in catcher in the rye noo links

What is a synonym for the word anguish based on the context in which the word appears in this line from james joyce's "araby"? gazing up into the darkness i saw myself as a creature driven and derided by vanity; and my eyes burned with anguish and anger. a. distrust b. torment c. sarcasm d. isolation e. ferocity