题目解析:
题干提问“对19世纪印刷价格的描述,以下哪个选项是错误的”。
定位第1段段2句 In the 1830s and 1840s, sharp reductions in prices 对应选项 A,正确;
第4句 novels that instead of an earlier price of $2 sold for 25 cents or less 对应选项 C,正确;
第5句 the first of several such episodes of declining prices that have profoundly affected information and culture during the past two centuries 对应选项 D,正确;
第3句 daily newspapers that instead of 6 cents per copy sold for a penny or two 对应选项 B,但是6 cents 是美国原来售价,并不是选项中提到的6 cents in Britain,错误。
故选 B