The following passage shows a boy, Stanley, teaching the alphabet to his friend Zero. Select the best evidence to support the statement that Zero is proud of himself. "F," said Stanley. "G," said Zero. He blew some air out of the side of his mouth. "H... I... K, P." "H, I, J, K, L," Stanley said. "That's right," said Zero. "I've heard it before. I just don't have it memorized exactly." "That's all right," said Stanley. "Here, I'll say the whole thing, just to kind of refresh your memory, then you can try it." He recited the alphabet for Zero, then Zero repeated it without a single mistake.... "Well, I've heard it before, somewhere," Zero said, trying to act like it was nothing, but his big smile gave him away. The next step was harder. Stanley had to figure out how to teach him to recognize each letter. From Louis Sachar, Holes. Copyright 1998 by Louis Sachar​