(单选题)

In what way shows that people have increased awareness of and protection for their mobile devices? ( )

A.Smart-phone users are increasingly aware of the importance of anti-virus software.

B.An increasing number of smart-phone users have installed built-in remote lock-and-erase software.

C.More smartphone users are protecting their devices with PINs and passwords than in previous years.

D.All of above.

参考答案：D

参考解析：

根据关键词awareness of and protection先明确答题区间：It turns out that mobile users in the US have begun implementing many of the initiatives set forth and have increased both awareness of, and protection for, their mobile devices综合后面三段内容大意。然后看清题干所问——哪些方式表明人们手机安全的保护意识越来越强。根据原文可知选项A、B、C对应的分别是文中提及的三种表现，所以都是正确的，故正确答案选D。

知识点：细节题英语阅读理解通用英语