单选题 These proposals sought to place greater restrictions on the use and copying of digital information than ______ in traditional media.

【正确答案】 A

【答案解析】than后面省略了成分“those restrictions which”，排除选项B。此处为省略了which的定语从句，排除选项C。exist in存在于，强调的是一个客观存在，所以用一般现在时。因此A项正确。