Robert grunted hello, and i pretended he was not worthy of existence.

amy tan uses this description to show that she.
a.wants to hide her true feelings about robert.
b.thinks robert is hard to understand.
c.has fallen out of love with robert.
d.has fallen out of love with robert.

Paul's thoughts are being revealed.

Explanation:

Paul saw those pigtails, and a terrible urge came over him. He wanted to pull a pigtail. He wanted to  wrap his fist around it, feel the hair between his fingers, and just yank. He thought it would be fun to tie  the pigtails together, or better yet, tie them to her chair. But most of all, he just wanted to pull one.