Which line in this excerpt from amy tan’s “mother tongue” shows that tan changes her language depending on her audience? “i was giving a talk to a large group of people, the same talk i had already given to half a dozen other groups. the talk was about my writing, my life, and my book, ‘the joy luck club’, and it was going along well enough, until i remembered one major difference that made the whole talk sound wrong. my mother was in the room. and it was perhaps the first time she had heard me give a lengthy speech, using the kind of english i have never used with her. i was saying things like ‘the intersection of memory upon imagination’ and ‘there is an aspect of my fiction that relates to this-and-thus’—a speech filled with carefully wrought grammatical phrases, burdened, it suddenly seemed to me, with normalized forms, past perfect tenses, conditional phrases, forms of standard english that i had learned in school and through ”