The traditional way to ensure data security is by ______. A．applying for cloud computing B．installing firewalls and antivirus programs C．decreasing the chances for hackers D．using a handful of hardwares and softwares
A. A．applying B.installing C.decreasing D.using
【参考答案】
B 题目中traditionalway是关键词，对应第一段第一句中usedtobe。第一段中提到人们过去花一大笔......