题目解析:
题干提问“印刷品爆发式增长之后,以下哪个是不符合阅读发生的变化”。
定位第2段倒数第1句,reading became an increasingly common form of diversion as well as devotion 对应选项 A,正确;
倒数第2句 reading became more varied 对应选项 C,正确;
倒数第2句 they soon passed on or discarded 对应选项 D,正确;
倒数第3句 readers scanned newspapers, magazines, and cheap books 对应选项 B,原文是 scan 浏览,即并非仔细阅读,与选项 B 提及 more carefully 不符,错误。
故选 B